var obj = [{ "first_name": "Manmath", "phone":"8295136796"},
{ "first_name": "Ayush", "phone":"9807406890"},
{ "first_name": "Damini ", "phone":"9582109274"},
{ "first_name": "Srajan", "phone":"9560831694"},
{ "first_name": "Subham ", "phone":"8826633423"},
{ "first_name": "Aryan ", "phone":"9816492396"},
{ "first_name": "Shivaji", "phone":"8447106431"},
{ "first_name": "sachin ", "phone":"9899539131"},
{ "first_name": "Hassan", "phone":"7903383816"},
{ "first_name": "Abhishek", "phone":"8789643880"},
{ "first_name": "Priya", "phone":"9625235411"},
{ "first_name": "Tejali", "phone":"9860085110"},
{ "first_name": "Atul", "phone":"8481954077"},
{ "first_name": "Arshad", "phone":"9205326503"},
{ "first_name": "Shubham", "phone":"7897663106"},
{ "first_name": "Antara", "phone":"7506739360"},
{ "first_name": "Anupama ", "phone":"9899456564"},
{ "first_name": "atul raj", "phone":"9999140906"},
{ "first_name": "Bharat", "phone":"9910058719"},
{ "first_name": "Shaik", "phone":"7013083653"},
{ "first_name": "Inderjeet", "phone":"7678546005"},
{ "first_name": "Shaurya", "phone":"7651897099"},
{ "first_name": "Asha", "phone":"9711156974"},
{ "first_name": "sunny", "phone":"9703680091"},
{ "first_name": "Atul", "phone":"9717054178"},
{ "first_name": "Salman", "phone":"9999511293"},
{ "first_name": "Faisal ", "phone":"9830509786"},
{ "first_name": "Swapnill", "phone":"7217795985"},
{ "first_name": "Sangeet", "phone":"9828547455"},
{ "first_name": "ravi", "phone":"7808000202"},
{ "first_name": "Kavita", "phone":"7259621025"},
{ "first_name": "Afsal", "phone":"7838124492"},
{ "first_name": "Shalu", "phone":"9355112525"},
{ "first_name": "Sandeep", "phone":"9008300326"},
{ "first_name": "Aryaman", "phone":"7042396713"},
{ "first_name": "Ashmita ", "phone":"8377931621"},
{ "first_name": "Amogh", "phone":"8800625382"},
{ "first_name": "Maneesha", "phone":"9910416761"},
{ "first_name": "Shiv Raj", "phone":"8986034222"},
{ "first_name": "Satyam", "phone":"7870680574"},
{ "first_name": "Mohit Bhasin", "phone":"9718088938"},
{ "first_name": "Jaime Santaella", "phone":"7303531977"},
{ "first_name": "Kirtika", "phone":"7508180880"},
{ "first_name": " Dr Kirti", "phone":"9811770194"},
{ "first_name": "Lucky", "phone":"7982313522"},
{ "first_name": "Shaalini", "phone":"9999600193"},
{ "first_name": "Shekhar ", "phone":"7838482531"},
{ "first_name": "Mehak", "phone":"8745907323"},
{ "first_name": "Yash ", "phone":"9871368830"},
{ "first_name": "Gaurav", "phone":"9634798502"},
{ "first_name": "Rohan GUPTA", "phone":"8736960707"},
{ "first_name": "Avinash", "phone":"8826756750"},
{ "first_name": "Nidhi", "phone":"7906462748"},
{ "first_name": "Indrani", "phone":"7757891847"},
{ "first_name": "Amrutha", "phone":"9315304799"},
{ "first_name": "Bishawamber", "phone":"9971286237"},
{ "first_name": "Dinesh", "phone":"9902610112"},
{ "first_name": "Vinod", "phone":"8860776389"},
{ "first_name": "amitesh", "phone":"7987506583"},
{ "first_name": "Mahendra", "phone":"9936742580"},
{ "first_name": "Anil Sadh", "phone":"9891055820"},
{ "first_name": "Sonu Balyan", "phone":"8708638260"},
{ "first_name": "Sudip", "phone":"8076813811"},
{ "first_name": "Kanishk Khandelwal", "phone":"8529549779"},
{ "first_name": "AKANKSHA", "phone":"8700466501"},
{ "first_name": "Jungdi", "phone":"7011491301"},
{ "first_name": "Shashank", "phone":"8802926757"},
{ "first_name": "Abhishek ", "phone":"7903477900"},
{ "first_name": "Vikash ", "phone":"8789529413"},
{ "first_name": "Akanksha", "phone":"8447271780"},
{ "first_name": "Harjoth", "phone":"8860278271"},
{ "first_name": "Nakul", "phone":"8130188987"},
{ "first_name": "himanshu", "phone":"7836997527"},
{ "first_name": "Deepanshi Agrawal", "phone":"8424022991"},
{ "first_name": "akhileshsbykers", "phone":"8520321230"},
{ "first_name": "Pardeep", "phone":"7015416611"},
{ "first_name": "RAJATT ARORA ", "phone":"9810321198"},
{ "first_name": "Tanmay", "phone":"9416318132"},
{ "first_name": "Aashish", "phone":"7011621944"},
{ "first_name": "Debayan", "phone":"8860688307"},
{ "first_name": "Solomon", "phone":"7982560422"},
{ "first_name": "Shashank", "phone":"9654323738"},
{ "first_name": "Aashish", "phone":"9711945643"},
{ "first_name": "Ankit", "phone":"9805787198"},
{ "first_name": "Nikita bisht", "phone":"9654657563"},
{ "first_name": "Danish", "phone":"9990164945"},
{ "first_name": "Harish", "phone":"9623401908"},
{ "first_name": "Shubhendu", "phone":"9538352902"},
{ "first_name": "Gaurav", "phone":"7838381006"},
{ "first_name": "Manoj", "phone":"9582184442"},
{ "first_name": "Vinod ", "phone":"9819437363"},
{ "first_name": "Preeti", "phone":"7977557813"},
{ "first_name": "Simran", "phone":"8209536973"},
{ "first_name": "Kalam", "phone":"9711722233"},
{ "first_name": "Saurabh Raj", "phone":"8709991843"},
{ "first_name": "Sunil", "phone":"9654082164"},
{ "first_name": "Mohit Jindal", "phone":"9891233057"},
{ "first_name": "Joao Maria", "phone":"7303544369"},
{ "first_name": "Abhyuday", "phone":"7838190777"},
{ "first_name": "Sunil", "phone":"8076175541"},
{ "first_name": "Sunil", "phone":"9818075896"},
{ "first_name": "Titha", "phone":"9051868213"},
{ "first_name": "seema", "phone":"9560033810"},
{ "first_name": "shakshi", "phone":"8860519540"},
{ "first_name": "Pratyusha", "phone":"9870747818"},
{ "first_name": "YOGESH", "phone":"9891043295"},
{ "first_name": "Madhukar", "phone":"8697730132"},
{ "first_name": "Madhukar ", "phone":"8697740132"},
{ "first_name": "Madhukar", "phone":"9952960132"},
{ "first_name": "Ajanta", "phone":"9971269880"},
{ "first_name": "venkatesh", "phone":"7838432347"},
{ "first_name": "Lakshay", "phone":"9627786282"},
{ "first_name": "Reeti", "phone":"9650913112"},
{ "first_name": "Shashank", "phone":"9015950170"},
{ "first_name": "Shubham", "phone":"9044530920"},
{ "first_name": "Ajay", "phone":"9686224155"},
{ "first_name": "Soni", "phone":"9811237401"},
{ "first_name": "Jaikant", "phone":"8368874995"},
{ "first_name": "Rohan", "phone":"9140074753"},
{ "first_name": "Pritamjeet", "phone":"7303057204"},
{ "first_name": "Manpreet ", "phone":"7982519524"},
{ "first_name": "Aditi", "phone":"6396105977"},
{ "first_name": "Aditya", "phone":"9818334192"},
{ "first_name": "Barsha", "phone":"9815766033"},
{ "first_name": "Pretamjeet", "phone":"7596873627"},
{ "first_name": "Fariz", "phone":"7838264988"},
{ "first_name": "SdhhhhA", "phone":"9899331511"},
{ "first_name": "arvind", "phone":"9899259923"},
{ "first_name": "Ishika Jain", "phone":"8299052190"},
{ "first_name": "Akansha", "phone":"9650844487"},
{ "first_name": "Udit", "phone":"9873621779"},
{ "first_name": "Geetansh", "phone":"9599427772"},
{ "first_name": "Bharat", "phone":"8433220318"},
{ "first_name": "Rahul ", "phone":"9672125378"},
{ "first_name": "Pradeep", "phone":"7759089202"},
{ "first_name": "Vishal", "phone":"6395420105"},
{ "first_name": "Divya", "phone":"8840035038"},
{ "first_name": "Dr anwar", "phone":"8178735150"},
{ "first_name": "pragya ", "phone":"9711292991"},
{ "first_name": "Gagan", "phone":"7889029426"},
{ "first_name": "Akshay ", "phone":"9717705992"},
{ "first_name": "Vineet", "phone":"8368486110"},
{ "first_name": "Saif", "phone":"6388412947"},
{ "first_name": "Shubham", "phone":"9015758558"},
{ "first_name": "Maria", "phone":"7550006850"},
{ "first_name": "Tanvi", "phone":"9818118422"},
{ "first_name": "Anil ", "phone":"7011103906"},
{ "first_name": "Aman", "phone":"9560609854"},
{ "first_name": "Ankit", "phone":"9711546721"},
{ "first_name": "Anjali", "phone":"9650786840"},
{ "first_name": "Aman", "phone":"9546252691"},
{ "first_name": "Kritika", "phone":"7348254567"},
{ "first_name": "Reshma", "phone":"9821226668"},
{ "first_name": "Archit", "phone":"9667245511"},
{ "first_name": "Saurabh Thukral", "phone":"8077447750"},
{ "first_name": "Himanshu", "phone":"7774077805"},
{ "first_name": "Devesh", "phone":"8010020127"},
{ "first_name": "Deven", "phone":"7524887823"},
{ "first_name": "Divya ", "phone":"8938916643"},
{ "first_name": "Ajay", "phone":"9958754751"},
{ "first_name": "Mithul", "phone":"7903259321"},
{ "first_name": "Adarsh", "phone":"6200221784"},
{ "first_name": "Soma", "phone":"9891243707"},
{ "first_name": "Saif", "phone":"7985447020"},
{ "first_name": "Nidhi", "phone":"9971249933"},
{ "first_name": "Vishal", "phone":"8077135150"},
{ "first_name": "aparajita", "phone":"7408452710"},
{ "first_name": "anchal", "phone":"9873504744"},
{ "first_name": "Megha", "phone":"9650919939"},
{ "first_name": "Deepa", "phone":"8860894505"},
{ "first_name": "Kapil", "phone":"7503439826"},
{ "first_name": "Prashant", "phone":"7007125037"},
{ "first_name": "Saurabh", "phone":"7004266239"},
{ "first_name": "Mohan", "phone":"9873456993"},
{ "first_name": "Abhishek", "phone":"6396128964"},
{ "first_name": "Harsh", "phone":"9911115303"},
{ "first_name": "Varun", "phone":"7291833667"},
{ "first_name": "Ayush", "phone":"8884477622"},
{ "first_name": "Kiran", "phone":"9953037250"},
{ "first_name": "Rahul", "phone":"9022693300"},
{ "first_name": "Chirag", "phone":"9701513082"},
{ "first_name": "Rahul", "phone":"9312342459"},
{ "first_name": "Akki", "phone":"9818427847"},
{ "first_name": "Dhirendra ", "phone":"9013771166"},
{ "first_name": "Aditya", "phone":"9837646570"},
{ "first_name": "Sahila manmeet", "phone":"9876089527"},
{ "first_name": "jamal shahid", "phone":"9945722785"},
{ "first_name": "Niranjan Satsangi", "phone":"8447460537"},
{ "first_name": "Sanjeev", "phone":"9805208111"},
{ "first_name": "Hemant", "phone":"8169854371"},
{ "first_name": "Akash", "phone":"7709256755"},
{ "first_name": "DEBADUTTA", "phone":"9513398111"},
{ "first_name": "Sachin Jain", "phone":"9667482330"},
{ "first_name": "Himanshu", "phone":"9354596167"},
{ "first_name": "Farheen", "phone":"9990932418"},
{ "first_name": "Vikrant", "phone":"8806844351"},
{ "first_name": "Neeraj", "phone":"9415147635"},
{ "first_name": "Praveen", "phone":"9794363282"},
{ "first_name": "Shashi Bhushan ", "phone":"9051115220"},
{ "first_name": "Divyanshu ", "phone":"8521466198"},
{ "first_name": "Fhhg", "phone":"9212276966"},
{ "first_name": "Ankit ", "phone":"8285300682"},
{ "first_name": "Siddharth Chauhan", "phone":"9918523401"},
{ "first_name": "Abhishek ", "phone":"7042433031"},
{ "first_name": "ARUN SIVAKUMAR", "phone":"9790799402"},
{ "first_name": "ASHISH", "phone":"9958730021"},
{ "first_name": "Sai", "phone":"9542395737"},
{ "first_name": "Shubham", "phone":"8871739841"},
{ "first_name": "Shefali", "phone":"9712396204"},
{ "first_name": "Ayushi", "phone":"9140538451"},
{ "first_name": "Mridul", "phone":"8700062480"},
{ "first_name": "Abhishek ", "phone":"8318240562"},
{ "first_name": "satyam", "phone":"7903400037"},
{ "first_name": "varun", "phone":"9315209972"},
{ "first_name": "Hritik", "phone":"7985342945"},
{ "first_name": "mandeep", "phone":"9899411902"},
{ "first_name": "Anil", "phone":"7419707272"},
{ "first_name": "chintan", "phone":"9871748003"},
{ "first_name": "Mayur", "phone":"9899210513"},
{ "first_name": "abhay", "phone":"7014877541"},
{ "first_name": "UTTAM", "phone":"7895228719"},
{ "first_name": "Sonu ", "phone":"8638860426"},
{ "first_name": "Aki", "phone":"9760009705"},
{ "first_name": "Saurabh", "phone":"8178255538"},
{ "first_name": "Pradeep", "phone":"8178880328"},
{ "first_name": "Gandharv", "phone":"8954596568"},
{ "first_name": "Sharmeen", "phone":"8707521423"},
{ "first_name": "Tarun", "phone":"9582514643"},
{ "first_name": "Kunal", "phone":"7737202462"},
{ "first_name": "Surabhi ", "phone":"8447911605"},
{ "first_name": "harish", "phone":"9717186627"},
{ "first_name": "narayan", "phone":"9711669467"},
{ "first_name": "Sunny ", "phone":"8826414775"},
{ "first_name": "Ayush", "phone":"7408995577"},
{ "first_name": "Martin", "phone":"9987280749"},
{ "first_name": "Aditya", "phone":"9999140404"},
{ "first_name": "Ramesh", "phone":"8929262611"},
{ "first_name": "priya", "phone":"9417696462"},
{ "first_name": "Ajit", "phone":"7838518741"},
{ "first_name": "Sakshi", "phone":"9560571794"},
{ "first_name": "Rahul", "phone":"9599662266"},
{ "first_name": "Vishwajeet", "phone":"8814006262"},
{ "first_name": "Abhishek ", "phone":"9873151493"},
{ "first_name": "Harvinder ", "phone":"9811415168"},
{ "first_name": "dhenu", "phone":"7008514775"},
{ "first_name": "Sushant", "phone":"7992382323"},
{ "first_name": "Gurjeet", "phone":"9599962995"},
{ "first_name": "Aman", "phone":"9504101222"},
{ "first_name": "Gagan", "phone":"96463662192"},
{ "first_name": "Gagan ", "phone":"9646362192"},
{ "first_name": "Lin", "phone":"7428114667"},
{ "first_name": "AKANKSHA", "phone":"7669018837"},
{ "first_name": "Akash", "phone":"7906848609"},
{ "first_name": "Sourav", "phone":"8789153857"},
{ "first_name": "Dharam", "phone":"7838764205"},
{ "first_name": "Shivangi ", "phone":"8860212615"},
{ "first_name": "Amar Nath", "phone":"9643595984"},
{ "first_name": "ravi", "phone":"8826199020"},
{ "first_name": "Nilika", "phone":"8340427214"},
{ "first_name": "anupama", "phone":"7701836303"},
{ "first_name": "Tarang", "phone":"7351786152"},
{ "first_name": "MOHIT", "phone":"9639000400"},
{ "first_name": "anand", "phone":"7011521340"},
{ "first_name": "Sagar", "phone":"7982405117"},
{ "first_name": "Shiv ", "phone":"7042601720"},
{ "first_name": "shekhar", "phone":"7004158979"},
{ "first_name": "manav", "phone":"9654496744"},
{ "first_name": "Abhishek Kumar", "phone":"7892359273"},
{ "first_name": "Kanishka", "phone":"7011372311"},
{ "first_name": "SANDEEP", "phone":"9968787880"},
{ "first_name": "Rekhaa", "phone":"9381411069"},
{ "first_name": "Manu", "phone":"7015715825"},
{ "first_name": "Raj Shekhar", "phone":"8619045836"},
{ "first_name": "Akshat ", "phone":"7355458275"},
{ "first_name": "Rohit", "phone":"7428835411"},
{ "first_name": "Anurag", "phone":"9889522259"},
{ "first_name": "PRATEEK", "phone":"8016868887"},
{ "first_name": "Prabhjot", "phone":"8447220798"},
{ "first_name": "Shyam", "phone":"8700635424"},
{ "first_name": "Prawal ", "phone":"8619356120"},
{ "first_name": "Mohak", "phone":"7999190075"},
{ "first_name": "Venu", "phone":"9841861491"},
{ "first_name": "Sivaram ", "phone":"7358217961"},
{ "first_name": "Akash", "phone":"9001578405"},
{ "first_name": "Aniket", "phone":"8609178884"},
{ "first_name": "Deepanshu", "phone":"7309359506"},
{ "first_name": "Arham", "phone":"9711198387"},
{ "first_name": "vikash", "phone":"6299090895"},
{ "first_name": "rohit", "phone":"7060153624"},
{ "first_name": "Smriti", "phone":"8867035197"},
{ "first_name": "Arpit", "phone":"9899133967"},
{ "first_name": "Pratap", "phone":"7669013579"},
{ "first_name": "Kiran ", "phone":"7731841833"},
{ "first_name": "Rakhi", "phone":"8810570140"},
{ "first_name": "Komal", "phone":"9899517109"},
{ "first_name": "Amandeep", "phone":"7589456334"},
{ "first_name": "ummer", "phone":"7006877226"},
{ "first_name": "Diva ", "phone":"7827351178"},
{ "first_name": "Ankit", "phone":"9971598863"},
{ "first_name": "Swati", "phone":"9899711334"},
{ "first_name": "Dr", "phone":"8919264443"},
{ "first_name": "Sushil", "phone":"9643958078"},
{ "first_name": "AYUSH", "phone":"9958834607"},
{ "first_name": "Siddhant", "phone":"8989871814"},
{ "first_name": "Harsh", "phone":"8357846396"},
{ "first_name": "Manisha", "phone":"9938295979"},
{ "first_name": "Dr Gowthami ", "phone":"9650063698"},
{ "first_name": "Dhairya", "phone":"9167202033"},
{ "first_name": "Vishal Panwar", "phone":"9761111455"},
{ "first_name": "Ashwani", "phone":"9871539280"},
{ "first_name": "Abhiskesh", "phone":"9354696140"},
{ "first_name": "Kanishk", "phone":"9324566014"},
{ "first_name": "ASHISH", "phone":"9871992397"},
{ "first_name": "Anugrah Singh ", "phone":"9570208693"},
{ "first_name": "Pradeep", "phone":"8882194414"},
{ "first_name": "AKASH SINGHAL", "phone":"8882367773"},
{ "first_name": "Dr praveen", "phone":"9868601899"},
{ "first_name": "ANANT AGARWAL", "phone":"9013490564"},
{ "first_name": "Shah navaz", "phone":"8876079456"},
{ "first_name": "Manav ", "phone":"9643971814"},
{ "first_name": "Kapil", "phone":"9828830763"},
{ "first_name": "Rakhi", "phone":"8178236121"},
{ "first_name": "Pankaj", "phone":"9873335224"},
{ "first_name": "Shubham", "phone":"7987363784"},
{ "first_name": "Prabhat ", "phone":"9999489419"},
{ "first_name": "Suchi", "phone":"8377951131"},
{ "first_name": "Harpreet", "phone":"8800833172"},
{ "first_name": "Divyam", "phone":"9078725520"},
{ "first_name": "Sonali", "phone":"8377026958"},
{ "first_name": "Ankit", "phone":"8789485721"},
{ "first_name": "Heena", "phone":"9582615367"},
{ "first_name": "Rishabh", "phone":"99994228648"},
{ "first_name": "Rishabh ", "phone":"9999428648"},
{ "first_name": "himanshu", "phone":"9810807011"},
{ "first_name": "Jishnu", "phone":"8826302235"},
{ "first_name": "Grijesh", "phone":"9911160787"},
{ "first_name": "Rishabh", "phone":"7509473611"},
{ "first_name": "Raju", "phone":"7015969523"},
{ "first_name": "Sunishtha", "phone":"9958683883"},
{ "first_name": "Hunny", "phone":"8882876464"},
{ "first_name": "Barthelat", "phone":"9667881768"},
{ "first_name": "Rajat", "phone":"9318401781"},
{ "first_name": "Moon", "phone":"7813914430"},
{ "first_name": "Vijay", "phone":"7022526137"},
{ "first_name": "Kuhoo", "phone":"7506905847"},
{ "first_name": "Dr Mashhood ", "phone":"9949408333"},
{ "first_name": "Ankit", "phone":"8130079908"},
{ "first_name": "Lakshay", "phone":"8791004004"},
{ "first_name": "Gavin", "phone":"8275890773"},
{ "first_name": "Aakash", "phone":"9424420462"},
{ "first_name": "Kanika", "phone":"8077816680"},
{ "first_name": "Nishi", "phone":"8511964958"},
{ "first_name": "Priyank", "phone":"9012072084"},
{ "first_name": "pratyush", "phone":"830822007"},
{ "first_name": "pratyush ", "phone":"8308220007"},
{ "first_name": "Neo", "phone":"8586931775"},
{ "first_name": "Priyanka", "phone":"9911441410"},
{ "first_name": "Saurabh", "phone":"7017875713"},
{ "first_name": "Nishi Juneja", "phone":"9737341243"},
{ "first_name": "Jasleen", "phone":"9643017441"},
{ "first_name": "Vignesh ", "phone":"9971971123"},
{ "first_name": "Tenzin", "phone":"9805329498"},
{ "first_name": "prabhat", "phone":"9955942273"},
{ "first_name": "Ramkrishna", "phone":"9835017908"},
{ "first_name": "Kamini", "phone":"9166522901"},
{ "first_name": "Kartik Singh", "phone":"8447246492"},
{ "first_name": "Sonam", "phone":"9953281873"},
{ "first_name": "Kanika", "phone":"9532770245"},
{ "first_name": "ram", "phone":"8919897537"},
{ "first_name": "Deepanshi", "phone":"9990202217"},
{ "first_name": "Akash", "phone":"9626222985"},
{ "first_name": "Dr Haider ", "phone":"8299678833"},
{ "first_name": "Chimga", "phone":"7303549644"},
{ "first_name": "ummer ", "phone":"9622515009"},
{ "first_name": "Yogesh", "phone":"9968624856"},
{ "first_name": "Pranay", "phone":"7009774108"},
{ "first_name": "Swati", "phone":"7768022770"},
{ "first_name": "DIVYA ", "phone":"8580715378"},
{ "first_name": "Achla", "phone":"9873722722"},
{ "first_name": "Mansi", "phone":"8109897697"},
{ "first_name": "Prem", "phone":"7014364378"},
{ "first_name": "Ibne", "phone":"9910799907"},
{ "first_name": "JAIGANESH", "phone":"9489768280"},
{ "first_name": "Nitish", "phone":"7296031076"},
{ "first_name": "Chetan", "phone":"8840270124"},
{ "first_name": "Lakshya srivastava", "phone":"8057799236"},
{ "first_name": "Anandi", "phone":"7755819988"},
{ "first_name": "Ankur", "phone":"7303148889"},
{ "first_name": "vibha", "phone":"8810561510"},
{ "first_name": "Arsheya", "phone":"8920938029"},
{ "first_name": "Gursimran", "phone":"9368630447"},
{ "first_name": "JAIRO", "phone":"9999999999"},
{ "first_name": "Divya", "phone":"7015033807"},
{ "first_name": "TINU", "phone":"9818050739"},
{ "first_name": "Sakshi", "phone":"8449544400"},
{ "first_name": "Hrishikesh", "phone":"7985388165"},
{ "first_name": "Madhuri ", "phone":"9810957426"},
{ "first_name": "Mayank", "phone":"9873511186"},
{ "first_name": "Subodh", "phone":"9818900147"},
{ "first_name": "Varun", "phone":"8929625622"},
{ "first_name": "Sanjana", "phone":"7317756221"},
{ "first_name": "Vikesh", "phone":"8010531200"},
{ "first_name": "Anurag Gupta", "phone":"8307514248"},
{ "first_name": "Gurupreet", "phone":"9111197711"},
{ "first_name": "Pradyuman", "phone":"6307627181"},
{ "first_name": "Akshat", "phone":"8840511479"},
{ "first_name": "ram kumar", "phone":"9990012836"},
{ "first_name": "Saurab", "phone":"9336418767"},
{ "first_name": "Adil ", "phone":"7766833174"},
{ "first_name": "Abhishek", "phone":"8178971389"},
{ "first_name": "Satvinder kaur", "phone":"8920038531"},
{ "first_name": "ASHU", "phone":"7289816544"},
{ "first_name": "Minny", "phone":"7977583977"},
{ "first_name": "Roshni", "phone":"7905246771"},
{ "first_name": "Joses", "phone":"7030497306"},
{ "first_name": "Jyoti", "phone":"9870164719"},
{ "first_name": "Rahul", "phone":"9599377759"},
{ "first_name": "muskan", "phone":"7988887699"},
{ "first_name": "Kanishka", "phone":"9999195247"},
{ "first_name": "Shreyashi", "phone":"9910180614"},
{ "first_name": "Prasit", "phone":"9205008738"},
{ "first_name": "mohit", "phone":"8595173640"},
{ "first_name": "Nitin ", "phone":"9815138348"},
{ "first_name": "Neeru", "phone":"7988012257"},
{ "first_name": "Subhinav", "phone":"9554136096"},
{ "first_name": "Abhishek", "phone":"9953726530"},
{ "first_name": "Anvit ", "phone":"9566189884"},
{ "first_name": "Priti ", "phone":"7827845435"},
{ "first_name": "Ambuj ", "phone":"7568317186"},
{ "first_name": "Nata", "phone":"9810173114"},
{ "first_name": "Shivangi", "phone":"7428022072"},
{ "first_name": "Harsh", "phone":"8340663134"},
{ "first_name": "Anita ", "phone":"9650027942"},
{ "first_name": "Prajna", "phone":"9654857596"},
{ "first_name": "Roopak", "phone":"8527085892"},
{ "first_name": "Soniya", "phone":"8826899123"},
{ "first_name": "Manik", "phone":"7986521371"},
{ "first_name": "bipin", "phone":"7007907043"},
{ "first_name": "Pranav", "phone":"9971380376"},
{ "first_name": "Namita ", "phone":"7838015195"},
{ "first_name": "Satvinder ", "phone":"9871834571"},
{ "first_name": "Ajay ", "phone":"9773867127"},
{ "first_name": "Kriti", "phone":"7042709853"},
{ "first_name": "Mohid Ahmad", "phone":"8802300755"},
{ "first_name": "Akshay", "phone":"9607607532"},
{ "first_name": "Sumit", "phone":"9021819017"},
{ "first_name": "Niranjana", "phone":"9080462234"},
{ "first_name": "Tarun Kumar", "phone":"9718625929"},
{ "first_name": "Kajal Aggarwal", "phone":"9958273320"},
{ "first_name": "Nitin", "phone":"7571956095"},
{ "first_name": "Prateek", "phone":"9873082071"},
{ "first_name": "Raj", "phone":"7838927657"},
{ "first_name": "Tarun", "phone":"7017531711"},
{ "first_name": "Sanjay", "phone":"7289943179"},
{ "first_name": "Prateek", "phone":"8521965407"},
{ "first_name": "Vinayak Agarwal", "phone":"7417764612"},
{ "first_name": "Vivek", "phone":"8368948527"},
{ "first_name": "Rexy", "phone":"9047519066"},
{ "first_name": "Kushagr", "phone":"8929536532"},
{ "first_name": "Alok ", "phone":"9911745432"},
{ "first_name": "Abhishek", "phone":"9953460403"},
{ "first_name": "Aman", "phone":"9654219346"},
{ "first_name": "Karan Bhardwaj", "phone":"9742484584"},
{ "first_name": "ABHISHEK", "phone":"7001310241"},
{ "first_name": "Mrityunjay", "phone":"8279927578"},
{ "first_name": "Sangeet Garg", "phone":"9897067489"},
{ "first_name": "Sangeet ", "phone":"6398276460"},
{ "first_name": "Vidya", "phone":"8299720959"},
{ "first_name": "Anish ", "phone":"8492969344"},
{ "first_name": "Vedantam", "phone":"8639681289"},
{ "first_name": "Anandeshwari", "phone":"9899410839"},
{ "first_name": "Sudhanshu", "phone":"9540293622"},
{ "first_name": "Aishwarya ", "phone":"7042315006"},
{ "first_name": "Shubham", "phone":"7004043522"},
{ "first_name": "Manu", "phone":"7347362321"},
{ "first_name": "Amit", "phone":"7390942441"},
{ "first_name": "Saurav", "phone":"8279683679"},
{ "first_name": "Gurpreet ", "phone":"9569908920"},
{ "first_name": "surender singh", "phone":"9910185748"},
{ "first_name": "Gaurav", "phone":"8826668682"},
{ "first_name": "Jai Samrat", "phone":"9717593590"},
{ "first_name": "Ujjwal", "phone":"8800192688"},
{ "first_name": "Deepak", "phone":"7428710474"},
{ "first_name": "Mayuri", "phone":"8709769929"},
{ "first_name": "Abhishek agarwal", "phone":"9699376701"},
{ "first_name": "Vishnu", "phone":"9899872444"},
{ "first_name": "Veeresh N", "phone":"9535582564"},
{ "first_name": "Abhishek", "phone":"7990203817"},
{ "first_name": "Vinay", "phone":"9899954475"},
{ "first_name": "Akash", "phone":"8377885053"},
{ "first_name": "Shraddha", "phone":"8595262078"},
{ "first_name": "Rakesh", "phone":"8240092474"},
{ "first_name": "Shailendra", "phone":"9313742554"},
{ "first_name": "amulya", "phone":"7347673771"},
{ "first_name": "Rachna", "phone":"8800810299"},
{ "first_name": "Chiranjeevi", "phone":"8076411349"},
{ "first_name": "ASHISH ", "phone":"9057537562"},
{ "first_name": "Shantanu", "phone":"9648751700"},
{ "first_name": "Shreya", "phone":"8851428992"},
{ "first_name": "Basu", "phone":"8660044573"},
{ "first_name": "Prasanth Kakula", "phone":"9971275722"},
{ "first_name": "Manish", "phone":"9910430844"},
{ "first_name": "Sarfraz", "phone":"8130685710"},
{ "first_name": "Rita", "phone":"7011491474"},
{ "first_name": "Piyush", "phone":"9326391939"},
{ "first_name": "harshila", "phone":"9818242122"},
{ "first_name": "Pratik", "phone":"8527943036"},
{ "first_name": "Sunil", "phone":"7289028328"},
{ "first_name": "Prateek", "phone":"9958255298"},
{ "first_name": "Shivangi", "phone":"8077873981"},
{ "first_name": "Afridi", "phone":"9664227831"},
{ "first_name": "Rekha", "phone":"9971306231"},
{ "first_name": "Akhya", "phone":"8884979725"},
{ "first_name": "Namrrta", "phone":"8800948370"},
{ "first_name": "Indresh ", "phone":"9650834322"},
{ "first_name": "Vijay", "phone":"9873705032"},
{ "first_name": "Aman", "phone":"9663332618"},
{ "first_name": "Varun ", "phone":"9821146439"},
{ "first_name": "Varun", "phone":"8510817322"},
{ "first_name": "Shraddha", "phone":"8851289050"},
{ "first_name": "Yash", "phone":"8802538425"},
{ "first_name": "Abhishek", "phone":"9650259188"},
{ "first_name": "Anant", "phone":"8745977047"},
{ "first_name": "Vigneshwaran", "phone":"8588811577"},
{ "first_name": "Sharath", "phone":"9971020473"},
{ "first_name": "Puja", "phone":"9205456694"},
{ "first_name": "Yash", "phone":"9325630430"},
{ "first_name": "Harsh ", "phone":"8882431002"},
{ "first_name": "Shantanu ", "phone":"7017699775"},
{ "first_name": "Komal", "phone":"8375098529"},
{ "first_name": "Riya ", "phone":"7503211956"},
{ "first_name": "supriya", "phone":"9798517319"},
{ "first_name": "Amit", "phone":"9999097289"},
{ "first_name": "shalini", "phone":"9560229196"},
{ "first_name": "Anand ", "phone":"9899484949"},
{ "first_name": "Kavya", "phone":"9315477724"},
{ "first_name": "Riya", "phone":"8368781303"},
{ "first_name": "Meghna ", "phone":"8860579462"},
{ "first_name": "Abhijay", "phone":"9625924818"},
{ "first_name": "Manan Rastogi", "phone":"7060788655"},
{ "first_name": "Parakh", "phone":"7898294288"},
{ "first_name": "Rupak", "phone":"7906536171"},
{ "first_name": "CHETAN", "phone":"8285445566"},
{ "first_name": "Ujjawal", "phone":"7906825149"},
{ "first_name": "Rita", "phone":"9958010018"},
{ "first_name": "Subhash chandra Sharma", "phone":"8178561079"},
{ "first_name": "Shekhar ", "phone":"9125943446"},
{ "first_name": "Satyam", "phone":"9334939068"},
{ "first_name": "Sangeeta ", "phone":"7978449687"},
{ "first_name": "Chandra Prakash ", "phone":"8770206392"},
{ "first_name": "Bhawneet Singh", "phone":"9888907157"},
{ "first_name": "Akhilesh", "phone":"9533287820"},
{ "first_name": "Jay", "phone":"7011431446"},
{ "first_name": "Sandip Lamichhane", "phone":"9870262058"},
{ "first_name": "Karan", "phone":"9999253881"},
{ "first_name": "Sonu", "phone":"9873624898"},
{ "first_name": "Lokesh", "phone":"9999406638"},
{ "first_name": "Abhishek", "phone":"7982943916"},
{ "first_name": "Rajulapati Mani madhuri", "phone":"9717055463"},
{ "first_name": "Twinkle ", "phone":"9911771394"},
{ "first_name": "Waleed", "phone":"9596348043"},
{ "first_name": "Akanksha", "phone":"9654232971"},
{ "first_name": "Gourav Singh", "phone":"9872496813"},
{ "first_name": "Saurav", "phone":"9354776206"},
{ "first_name": "Nafeesa", "phone":"7994276656"},
{ "first_name": "VASU ", "phone":"7877061251"},
{ "first_name": "Mithlesh ", "phone":"9454116812"},
{ "first_name": "Shruti", "phone":"9971053967"},
{ "first_name": "SAMBHAV", "phone":"8527027612"},
{ "first_name": "Anuj ", "phone":"7302887089"},
{ "first_name": "Sara", "phone":"8588071920"},
{ "first_name": "Kuldeep", "phone":"9660014334"},
{ "first_name": "Harsha vardhan", "phone":"9441017047"},
{ "first_name": "Kunal", "phone":"9711575988"},
{ "first_name": "Vaishali ", "phone":"9958227560"},
{ "first_name": "Narayani", "phone":"6392241014"},
{ "first_name": "Roshna", "phone":"7042688254"},
{ "first_name": "Mahan", "phone":"8826530393"},
{ "first_name": "Rhythm ", "phone":"9773527780"},
{ "first_name": "Simpal rao", "phone":"9625059315"},
{ "first_name": "Chetan", "phone":"9017269424"},
{ "first_name": "Akash", "phone":"8052221442"},
{ "first_name": "King", "phone":"8290125695"},
{ "first_name": "Ravinder", "phone":"9871937893"},
{ "first_name": "Jeet", "phone":"9990279004"},
{ "first_name": "Dharamveer ", "phone":"9953228100"},
{ "first_name": "Megha ", "phone":"9999867807"},
{ "first_name": "Akrity ", "phone":"9504007884"},
{ "first_name": "Saurav", "phone":"8719822812"},
{ "first_name": "Abhimanyu Singh", "phone":"8209708930"},
{ "first_name": "Aman", "phone":"8340348478"},
{ "first_name": "Vivek", "phone":"8447502855"},
{ "first_name": "Usha ", "phone":"8800796155"},
{ "first_name": "Kuldeep", "phone":"8882975192"},
{ "first_name": "Pramit Choudhary", "phone":"9205439588"},
{ "first_name": "Fatima", "phone":"8017292791"},
{ "first_name": "Neha", "phone":"9811437937"},
{ "first_name": "Khushboo", "phone":"9326939863"},
{ "first_name": "Harsh ", "phone":"8920227990"},
{ "first_name": "Prakash", "phone":"9718384687"},
{ "first_name": "Praveen", "phone":"8447202038"},
{ "first_name": "Arun", "phone":"7906066020"},
{ "first_name": "Amol", "phone":"9669160533"},
{ "first_name": "Kalpana", "phone":"9368423761"},
{ "first_name": "Ruchi", "phone":"9953697592"},
{ "first_name": "Smarika", "phone":"8318822347"},
{ "first_name": "Himanshu S", "phone":"7982778112"},
{ "first_name": "Prashant", "phone":"9821779224"},
{ "first_name": "Priya", "phone":"8830166254"},
{ "first_name": "SAURAV", "phone":"9174443097"},
{ "first_name": "Saurav", "phone":"8770172701"},
{ "first_name": "Kamalika", "phone":"9836435246"},
{ "first_name": "Anu Saxena", "phone":"9810741819"},
{ "first_name": "Supreet", "phone":"7906628806"},
{ "first_name": "Sushmita", "phone":"8797332553"},
{ "first_name": "NAVDEEP", "phone":"8368995779"},
{ "first_name": "Ruchi Deshpande", "phone":"8007964345"},
{ "first_name": "Harshit", "phone":"9691236016"},
{ "first_name": "Pranay Kumar", "phone":"9560536854"},
{ "first_name": "Faiz", "phone":"8791870398"},
{ "first_name": "Sakshi", "phone":"9102514233"},
{ "first_name": "Shashank", "phone":"8375085783"},
{ "first_name": "Logeshwar ", "phone":"9894463920"},
{ "first_name": "Rishabh", "phone":"7303666036"},
{ "first_name": "Harshit", "phone":"8765733976"},
{ "first_name": "Waris", "phone":"9797830614"},
{ "first_name": "Nandini ", "phone":"9873697504"},
{ "first_name": "Ashu", "phone":"9717020932"},
{ "first_name": "Mythreyee", "phone":"9011773728"},
{ "first_name": "Nitesh", "phone":"7004282314"},
{ "first_name": "Shobha", "phone":"7003417080"},
{ "first_name": "Akanksha", "phone":"7992286083"},
{ "first_name": "Shantanu", "phone":"9557492296"},
{ "first_name": "Shoaib Ikram", "phone":"9716542786"},
{ "first_name": "Rohn", "phone":"9654631780"},
{ "first_name": "Himanshu", "phone":"8960322274"},
{ "first_name": "Gagan", "phone":"8882339834"},
{ "first_name": "Devanshu", "phone":"7800474241"},
{ "first_name": "Ravi", "phone":"9999863545"},
{ "first_name": "rishi", "phone":"7701925132"},
{ "first_name": "Siddharth", "phone":"9971738811"},
{ "first_name": "Arun", "phone":"8440931406"},
{ "first_name": "Ruchi", "phone":"9015050976"},
{ "first_name": "Pankhuri", "phone":"8287602215"},
{ "first_name": "Prabal", "phone":"8447018126"},
{ "first_name": "Saurabh", "phone":"9955367629"},
{ "first_name": "Gaurav", "phone":"9999819128"},
{ "first_name": "GAURAV", "phone":"9899965667"},
{ "first_name": "Kumar", "phone":"8630166472"},
{ "first_name": "Jyotshna Jyotshna", "phone":"7903317893"},
{ "first_name": "Gaurav", "phone":"9557160696"},
{ "first_name": "rishi gupta", "phone":"7710925132"},
{ "first_name": "Bhuwan", "phone":"9467425337"},
{ "first_name": "Harsh Goyal", "phone":"8800445054"},
{ "first_name": "Anurag Gupta", "phone":"9620978139"},
{ "first_name": "Rakhi", "phone":"8882606268"},
{ "first_name": "Tushar", "phone":"9818275882"},
{ "first_name": "Shiraz", "phone":"9999002438"},
{ "first_name": "Varsha", "phone":"7827919294"},
{ "first_name": "SHIVANI", "phone":"8929639887"},
{ "first_name": "Anuneeta", "phone":"8920898012"},
{ "first_name": "anil", "phone":"8178254066"},
{ "first_name": "SATYAJEET ", "phone":"9334936162"},
{ "first_name": "Satyam", "phone":"7891036236"},
{ "first_name": "karta", "phone":"8505881199"},
{ "first_name": "pankaj ", "phone":"8423999068"},
{ "first_name": "SACHIN", "phone":"9999753200"},
{ "first_name": "Shyamal", "phone":"9811978678"},
{ "first_name": "Gaurav ", "phone":"9123231780"},
{ "first_name": "Mayank", "phone":"9611886339"},
{ "first_name": "Parul", "phone":"8130990864"},
{ "first_name": "Anshika arora", "phone":"9999023133"},
{ "first_name": "MRINMOY ", "phone":"8210947877"},
{ "first_name": "ashish ", "phone":"7982547319"},
{ "first_name": "Shubham", "phone":"8860690450"},
{ "first_name": "shashank", "phone":"9911432933"},
{ "first_name": "Tanzeel Ahmad", "phone":"9999672995"},
{ "first_name": "Tanzeel Ahmad", "phone":"9311416350"},
{ "first_name": "mayank", "phone":"9213947478"},
{ "first_name": "Sairabh", "phone":"9315521007"},
{ "first_name": "Utkarsh Garg", "phone":"8588820601"},
{ "first_name": "Rahul", "phone":"9167782855"},
{ "first_name": "IPSHIT VISHNOI", "phone":"9917022628"},
{ "first_name": "Ginny KASHYAP", "phone":"8557865254"},
{ "first_name": "Ashu Prakash", "phone":"8604099321"},
{ "first_name": "Kartik Sharma ", "phone":"9953958124"},
{ "first_name": "Niharika", "phone":"9953316066"},
{ "first_name": "Monika", "phone":"9599766992"},
{ "first_name": "Sarika", "phone":"8601250015"},
{ "first_name": "Rohit", "phone":"7217302204"},
{ "first_name": "Nanncyy Sharma", "phone":"9711000724"},
{ "first_name": "dheeraj bhalla", "phone":"8375069085"},
{ "first_name": "Vg", "phone":"7982409380"},
{ "first_name": "Kathe Sai Charan", "phone":"8920428282"},
{ "first_name": "Divyanshu tiwari", "phone":"8005129088"},
{ "first_name": "SAMEER KUMAR", "phone":"9555315301"},
{ "first_name": "Aman Bohtan", "phone":"7227979030"},
{ "first_name": "Vishesh", "phone":"9636377000"},
{ "first_name": "Ved Prakash", "phone":"7500240382"},
{ "first_name": "Pankaj Vishnoi", "phone":"9810739033"},
{ "first_name": "Komal Garg", "phone":"9915296283"},
{ "first_name": "PRANAV A", "phone":"9159106760"},
{ "first_name": "Zaid jafri", "phone":"9810860927"},
{ "first_name": "Ajeet Singh", "phone":"8506800010"},
{ "first_name": "Shivam", "phone":"7531053080"},
{ "first_name": "Deepak Pandey", "phone":"9501431947"},
{ "first_name": "Diva Singh", "phone":"8860919819"},
{ "first_name": "Sukanth kumar srivastav", "phone":"9654041782"},
{ "first_name": "Deepika", "phone":"9582363012"},
{ "first_name": "Snehal", "phone":"8368829267"},
{ "first_name": "Ankita Nebhani", "phone":"9839365777"},
{ "first_name": "Chandan ", "phone":"9650109333"},
{ "first_name": "Arpit ", "phone":"8076426564"},
{ "first_name": "Atul ", "phone":"9999110906"},
{ "first_name": "Manleen ", "phone":"8439775126"},
{ "first_name": "Vimal", "phone":"8178699050"},
{ "first_name": "Ankit", "phone":"8210730142"},
{ "first_name": "Ankit ", "phone":"7011024411"},
{ "first_name": "Annu", "phone":"7678371728"},
{ "first_name": "Vani", "phone":"8860622403"},
{ "first_name": "Ansh ", "phone":"6205504145"},
{ "first_name": "Shivani", "phone":"7875679718"},
{ "first_name": "Rohit ", "phone":"999986468"},
{ "first_name": "Ravi ", "phone":"8287703637"},
{ "first_name": "Shivajeet ", "phone":"8544325412"},
{ "first_name": "Ashima ", "phone":"9780397850"},
{ "first_name": "Madan", "phone":"8810422298"},
{ "first_name": "Anil ", "phone":"7903082521"},
{ "first_name": "Abhishek ", "phone":"8860767640"},
{ "first_name": "Goaran", "phone":"7007729301"},
{ "first_name": "Tanvi ", "phone":"3818118422"},
{ "first_name": "Tanveer ", "phone":"9810612017"},
{ "first_name": "Ankur", "phone":"9811608726"},
{ "first_name": "Aditi", "phone":"9717672484"},
{ "first_name": "Faiz", "phone":"8368844995"},
{ "first_name": "Sunil", "phone":"7667780176"},
{ "first_name": "Shivam", "phone":"8881122100"},
{ "first_name": "Ajay", "phone":"7004455905"},
{ "first_name": "Manleen ", "phone":"8527311205"},
{ "first_name": "Rahul", "phone":"8700734111"},
{ "first_name": "Gaurav", "phone":"7217604494"},
{ "first_name": "Prashant", "phone":"9625177047"},
{ "first_name": "Zahir", "phone":"8825030330"},
{ "first_name": "Karan", "phone":"7042740464"},
{ "first_name": "Naki hoge", "phone":"9816310916"}
];
alert(obj.length) 

Javascript Online Compiler

Write, Run & Share Javascript code online using OneCompiler's JS online compiler for free. It's one of the robust, feature-rich online compilers for Javascript language. Getting started with the OneCompiler's Javascript editor is easy and fast. The editor shows sample boilerplate code when you choose language as Javascript and start coding.

About Javascript

Javascript(JS) is a object-oriented programming language which adhere to ECMA Script Standards. Javascript is required to design the behaviour of the web pages.

Key Features

  • Open-source
  • Just-in-time compiled language
  • Embedded along with HTML and makes web pages alive
  • Originally named as LiveScript.
  • Executable in both browser and server which has Javascript engines like V8(chrome), SpiderMonkey(Firefox) etc.

Syntax help

STDIN Example

var readline = require('readline');
var rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
  terminal: false
});

rl.on('line', function(line){
    console.log("Hello, " + line);
});

variable declaration

KeywordDescriptionScope
varVar is used to declare variables(old way of declaring variables)Function or global scope
letlet is also used to declare variables(new way)Global or block Scope
constconst is used to declare const values. Once the value is assigned, it can not be modifiedGlobal or block Scope

Backtick Strings

Interpolation

let greetings = `Hello ${name}`

Multi line Strings

const msg = `
hello
world!
`

Arrays

An array is a collection of items or values.

Syntax:

let arrayName = [value1, value2,..etc];
// or
let arrayName = new Array("value1","value2",..etc);

Example:

let mobiles = ["iPhone", "Samsung", "Pixel"];

// accessing an array
console.log(mobiles[0]);

// changing an array element
mobiles[3] = "Nokia";

Arrow functions

Arrow Functions helps developers to write code in concise way, it’s introduced in ES6.
Arrow functions can be written in multiple ways. Below are couple of ways to use arrow function but it can be written in many other ways as well.

Syntax:

() => expression

Example:

const numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
const squaresOfEvenNumbers = numbers.filter(ele => ele % 2 == 0)
                                    .map(ele => ele ** 2);
console.log(squaresOfEvenNumbers);

De-structuring

Arrays

let [firstName, lastName] = ['Foo', 'Bar']

Objects

let {firstName, lastName} = {
  firstName: 'Foo',
  lastName: 'Bar'
}

rest(...) operator

 const {
    title,
    firstName,
    lastName,
    ...rest
  } = record;

Spread(...) operator

//Object spread
const post = {
  ...options,
  type: "new"
}
//array spread
const users = [
  ...adminUsers,
  ...normalUsers
]

Functions

function greetings({ name = 'Foo' } = {}) { //Defaulting name to Foo
  console.log(`Hello ${name}!`);
}
 
greet() // Hello Foo
greet({ name: 'Bar' }) // Hi Bar

Loops

1. If:

IF is used to execute a block of code based on a condition.

Syntax

if(condition){
    // code
}

2. If-Else:

Else part is used to execute the block of code when the condition fails.

Syntax

if(condition){
    // code
} else {
    // code
}

3. Switch:

Switch is used to replace nested If-Else statements.

Syntax

switch(condition){
    case 'value1' :
        //code
        [break;]
    case 'value2' :
        //code
        [break;]
    .......
    default :
        //code
        [break;]
}

4. For

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
//code  
} 

5. While

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
  // code 
}  

6. Do-While

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
  // code 
} while (condition); 

Classes

ES6 introduced classes along with OOPS concepts in JS. Class is similar to a function which you can think like kind of template which will get called when ever you initialize class.

Syntax:

class className {
  constructor() { ... } //Mandatory Class method
  method1() { ... }
  method2() { ... }
  ...
}

Example:

class Mobile {
  constructor(model) {
    this.name = model;
  }
}

mbl = new Mobile("iPhone");