//Write a program to calculate average of all numbers between n1 and n2(eg.100 to 300 Read
//values of n1 and n2 from user)
object MyClass {
def main(args: Array[String]) {
print("Enter the number from there you want to start");
var n1=scala.io.StdIn.readInt();
print("Enter the number upto were you want to go");
var n2=scala.io.StdIn.readInt();
var sum:Float=0;
var count:Int=0;
for(i<-n1 to (n2)){
sum+=i;
count=count+1;
}
var result:Float=(sum/count);
print("The Average of all element is "+result)
}
}
//2. Write a program to calculate factorial of a number
object Main{
def main(args:Array[String])
{
var fact=1;
print("Eneter the number which factorial you want")
var n=scala.io.StdIn.readInt();
for(i<-1 to n){
fact=fact*i;
}
print("The given number fact is"+fact)
}}
//3Write a program to read five random numbers and check that random numbers are perfect
object Main{
def main(args:Array[String])
{
var arr=new Array[Int](5);
print("Enter five Random Number");
for(i<-0 to 5-1){
print("Enter the number "+i+": ");
arr(i)=scala.io.StdIn.readInt();
}
var ans=0;
for(i<-0 to 5-1){
for(j<-1 to (arr(i)/2)){
if(arr(i)%j==0){
ans=ans+j;
}else{}
}
if(ans==arr(i)){
print("The Given number "+arr(i)+" is perfect \n");
}else{
print("The Given number "+arr(i)+" not is perfect \n");
}
}
}
}
//4. Write a program to find second maximum number of four given numbers.
object Main{
def main(args:Array[String])
{
var arr=new Array[Int](5);
print("Enter five Random Number");
for(i<-0 to 4-1)
{
print("Enter the number "+i+1+": ");
arr(i)=scala.io.StdIn.readInt();
}
var temp:Int=0;
for(i<-0 to 4-2)
{
for(j<-i+1 to 4-1)
{
if(arr(i)<arr(j))
{
temp=arr(i);
arr(i)=arr(j);
arr(j)=temp;
}
}
}
print("The second highest number"+arr(1));
}
}
//1 to 100 prime umber sum
object Main{
def main(args:Array[String])
{ var sum=0;
var n: Int=2;
var count=0;
for(j<- 2 to 100){
count=0;
for(i<- 2 to j/2){
if(j%i==0){
count=count+1;
}
}
if(count==0){
print("It is a prime number "+j+"\n");
sum=sum+j;
}else{
}
}
print("sum "+sum)
}
}
//6. Write a program to read an integer from user and convert it to binary and octal using user
//defined functions.
object Demo6
{
def octal(num:Int) :Unit =
{
printf("Octal value : %o\n", num)
}
def main(args:Array[String])
{
print("Enter the Number = ")
var num = scala.io.StdIn.readInt()
var binary = (num).toBinaryString
println("Binary of "+num+" is "+binary)
octal(num);
}
}
Arrays.
//1. Write a program to find maximum and minimum of an array
object MyClass {
def main(args: Array[String]) {
print("Enter")
var n=scala.io.StdIn.readInt();
var arr=new Array[Int](n);
for(i<-0 to n-1){
arr(i)=scala.io.StdIn.readInt();
}
var temp=0;
for(i<- 0 to n-2){
for(j<- i+1 to n-1)
{
if(arr(i)>arr(j)){
temp=arr(i);
arr(i)=arr(j);
arr(j)=temp;
}
}
}
print("Then minimun number is "+arr(0)+"\n");
print("The maximun number is "+arr(n-1))
}
}
//2. Write a program to calculate transpose of a matrix.
object MyClass {
def main(args: Array[String]) {
print("Enter")
var A= Array.ofDim[Int](2,2);
var c= Array.ofDim[Int](2,2);
for(i<- 0 to 2-1){
for(j<- 0 to 2-1)
{
print("Enter the element of the matix \t");
A(i)(j)=scala.io.StdIn.readInt();
}
}
for(i<- 0 to 2-1){
for(j<- 0 to 2-1)
{
print(A(j)(i)+" ");
}
print("\n")
}
}
}
//3. Write a program to calculate determinant of a matrix
object Main{
def main(args:Array[String]){
var A=Array.ofDim[Int](2,2);
for(i<- 0 to 1)
{
for(j<- 0 to 1)
{
A(i)(j)=scala.io.StdIn.readInt();
}
}
var det=(A(0)(0)*A(1)(1))-(A(0)(1)*A(1)(0))
print("The determinant is "+ det)
}
}
//4. Write a program to check if the matrix is upper triangular or not.
object Main{
def main(args:Array[String]){
print("Enter the matrix ");
var n=scala.io.StdIn.readInt();
var A=Array.ofDim[Int](n,n);
for(i<- 0 to n-1)
{
for(j<- 0 to n-1)
{
print("Enter the matrix vlaue")
A(i)(j)=scala.io.StdIn.readInt();
}
}
var isUpper = 1;
for(i<-0 to n-1)
{
for(j<-0 to n-1)
{
if(j<i && A(i)(j)!=0)
{
isUpper = 0;
}
}
}
if(isUpper==1)
{
println("\nThis is a Upper triangular matrix")
for(i<-0 to n-1)
{
for(j<-0 to n-1)
{
if(A(i)(j)!= 0)
{
print(A(i)(j)+"\t");
}
else
{
print("\t");
}
}
print("\n\n");
}
}
else
{
print("\nThis is Not a Upper triangular matrix.");
}
}
}
// 5. Write a program to sort the matrix using insertion sort.
object InsertionSort {
def main(args: Array[String]) {
val array = Array.ofDim[Int](2,2)
array(0)(0)=3
array(0)(1)=2
array(1)(0)=1
array(1)(1)=0
println("Unsorted matrix ")
for(i <- 0 until 2){
for(j <- 0 until 2){
print(array(i)(j)+"\t")
}
println()
}
println("Asceding sorted matrix ")
var temp=0
var a:Int=0
var b:Int=0
for (a <- 0 until 2) {
for (b <- 0 until 2){
if(a==0 && b==0){}
else{
temp = array(a)(b)
}
var k = a
var l = b
while (k >= 0 && l>=0 && temp < array(a)(b)) {
array(a + 1)(b + 1) = array(a)(b)
k = k-1;
l = l-1;
}
array(a)(b) = temp
print(array(a)(b)+"\t")
}
println()
}
}
}
//6. Write a program for multiplication of two matrices(Validate number of rows andcolumns
//efore multiplication and give appropriate message)
object Sample {
def main(args: Array[String]) {
var Matrix1 = Array.ofDim[Int](2, 2)
var Matrix2 = Array.ofDim[Int](2, 2)
var Matrix3 = Array.ofDim[Int](2, 2)
var i: Int = 0
var j: Int = 0
var k: Int = 0
var sum: Int = 0
printf("Enter elements of MATRIX1:\n")
i = 0;
while (i < 2) {
j = 0;
while (j < 2) {
printf("ELEMENT(%d)(%d): ", i, j);
Matrix1(i)(j) = scala.io.StdIn.readInt();
j = j + 1;
}
i = i + 1;
}
printf("Enter elements of MATRIX2:\n")
i = 0;
while (i < 2) {
j = 0;
while (j < 2) {
printf("ELEMENT(%d)(%d): ", i, j);
Matrix2(i)(j) = scala.io.StdIn.readInt();
j = j + 1;
}
i = i + 1;
}
//Multiply Matrix1 and Matrix2
i = 0;
while (i < 2) {
j = 0;
while (j < 2) {
sum = 0;
k = 0;
while (k < 2) {
sum = sum + (Matrix1(i)(k) * Matrix2(k)(j));
k = k + 1;
}
Matrix3(i)(j) = sum;
j = j + 1;
}
i = i + 1;
}
printf("MATRIX1:\n")
i = 0;
while (i < 2) {
j = 0;
while (j < 2) {
printf("%d ", Matrix1(i)(j));
j = j + 1;
}
i = i + 1;
println();
}
printf("MATRIX2:\n")
i = 0;
while (i < 2) {
j = 0;
while (j < 2) {
printf("%d ", Matrix2(i)(j));
j = j + 1;
}
i = i + 1;
println();
}
printf("Multiplication of Matrix1 and Matrix2:\n")
i = 0;
while (i < 2) {
j = 0;
while (j < 2) {
printf("%d ", Matrix3(i)(j));
j = j + 1;
}
i = i + 1;
println();
}
}
}
String.
//1. Write a program to count uppercase letters in a string and convert it to lowercase and display
//the new string.
object Sample {
def main(args: Array[String]): Unit = {
var str = "Divya Manoj Harke";
var count=0;
for(i<-0 to str.length()-1){
var ch:Char =str.charAt(i);
if(ch>='A' && ch<='Z')
{
count=count+1;
}
}
// Convert the above string to all lowercase.
var lowerStr = str.toLowerCase();
var upperStr = str.toUpperCase();
println("uppercase letters:"+count)
// Display the two strings for comparison.
println("Original String: " + str);
println("String in lowercase: " + lowerStr);
//println("String in uppercase: " + upperStr);
}
}
//2.Write a program to read a character from user and count the number of occurrences ofthat
//character.
object myObject {
def main(args: Array[String]) {
print("Enter the string");
var s:Char=scala.io.StdIn.readChar();
val string = "Learn programming at IncludeHelp"
val count = string.count(_ == s)
println("This string is '" + string + "'")
println("Count of 'r' in the string :" + count)
}
}
//Q3. Write a program to read two strings. Remove the occurrence of second string in first string.
object Demo3
{
def main(args:Array[String])
{
print("Enter First String = ")
var st1 = scala.io.StdIn.readLine().toCharArray()
print("Enter Second String = ")
var st2 = scala.io.StdIn.readLine().toCharArray()
for(i<-0 to (st2.length-1))
{
for(j<-0 to (st1.length-1))
{
if(st2(i) == st1(j))
{
st1(j) = '*'
}
}
}
for(i<-0 to (st1.length-1))
{
println(st1(i))
}
}
}
//4. Create array of strings and read a string from user. Display all the elements of array
//containing given string.
object Demo4
{
def main(args:Array[String])
{
print("How Many String Do u want to store = ")
var n = scala.io.StdIn.readInt()
var arr = new Array[String](n)
for(a<-0 to (arr.length-1))
{
print("Enter String"+" "+(a+1)+" = ")
arr(a) = scala.io.StdIn.readLine()
}
for(i<-arr)
{
println(i)
}
}
}
Classes and Objects:
//1. Define a class CurrentAccount (accNo, name, balance, minBalance). Define appropriate
//constructors and operations withdraw(), deposit(), viewBalance(). Create an object and
//perform operations
class CurrentAc(accN:Int,nam:String,Balanc:Double){
var accNo=accN;
var name=nam;
var Balance=Balanc;
var minB:Double=3000;
def withdraw(){
print("Enter the widdraw amount ")
var w=scala.io.StdIn.readInt();
if((Balance-w)>=minB){
print("Withdraw suscceful "+"\n");
Balance=Balance-w;
print("The balance is "+Balance+"\n");
}else{
print("can't widthdraw balance insuffeciber "+"\n");
}
}
def deposit(){
print("Enter the amount you want to deposit ")
var d=scala.io.StdIn.readInt();
Balance=Balance+d;
print("The Updated balance is "+Balance+"\n");
}
def viewBalance(){
print("The account Balance is "+ Balance +"\n")
}
}
object Main
{
def main(args:Array[String]): Unit =
{
print("Enter the Acount Number"+"\n");
val accNo=scala.io.StdIn.readInt();
print("Enter the name of the AcountHolder"+"\n");
var name =scala.io.StdIn.readLine();
print("Enter Balance"+"\n");
var Balance=scala.io.StdIn.readDouble();
var A=new CurrentAc(accNo,name,Balance);
var s=0;
do{
print("1.Enter 1 for withdraw \n");
print("2.Enter 2 for Deposit \n");
print("3. Enter 3 for View Balance \n")
print("4. Enter exit \n")
var n=scala.io.StdIn.readInt()
n match{
case 1=>A.withdraw();
case 2=>A.deposit();
case 3=>A.viewBalance();
case 4=>print("exiting ...");s=1;
case _ => println("Invalid choice entered, Try again...")
}
}while(s==0);
}
}
//Q2. Define a class Employee (id, name, salary). Define methods accept() and display().//Display details of employee having maximum salary.
class Empoley(id:Int, name:String)
{
var salary:Int = 0 //default value
def showDetails()
{
println(id+" "+name+" "+salary)
}
def this(id:Int, name:String,salary:Int)
{
this(id,name) // Calling primary constructor (see parameters in class decalration)
this.salary = salary
}
}
object MainObject
{
def main(args:Array[String])
{
var emp:Array[Empoley]=new Array[Empoley](4)
emp(0)=new Empoley(101,"Rama",201241)
emp(1)=new Empoley(10,"Ram",601341)
emp(2)=new Empoley(103,"Ramay",801234)
emp(3)=new Empoley(104,"Ramo",1001234)
var salary:Empoley=new Empoley(0,"",0) // a temporary object
salary = emp(0) //assigning first record/object to max
var maxsalary=emp(0).salary // a temporary maxmarks variable to contain max value
for( i <-0 to 3)
{
if(emp(i).salary>maxsalary)
{
maxsalary=emp(i).salary
salary=emp(i)
}
}
println("student details with maximum marks is")
println(salary.showDetails())
}
}
//Q4. Create abstract class Shape with abstract functions volume() and display(). Extend two classes //Cube and Cylinder from it. Calculate volume of each and display
abstract class shape(r:Int,h:Int)
{
var vol1:Double=0
var pi:Double=3.14
def volume()
def display()
}
class cylinder(r:Int,h:Int)extends shape(r,h)
{
def volume()
{
var vol:Double=0
vol=pi*r*r*h
vol1=vol
println("*****")
println("volume is:"+vol)
}
def display()
{ println("***")
println("radius of cylinder:"+r)
println("height of cylinder:"+h)
println("volume of cylinder:"+vol1)
}
}
object Demo4
{
def main(args:Array[String])
{
var radius:Int=0
var height:Int=0
println("enter radius of cylinder:")
radius=scala.io.StdIn.readInt()
println("enter hight of cylinder")
height=scala.io.StdIn.readInt()
var n=new cylinder(radius,height)
n.volume()
n.display()
}
}
Q5. Create class Project (id, name, location). Define parameterized constructor. Keep a count of each object created and display the details of each project.
class Project(id:Int,name:String,location:String)
{
var i:Int = 0;
def display()
{
println(id+" "+name+" "+" "+location)
}
}
object Demo5 {
def main(args: Array[String])
{
print("How Many Object = ")
var n = scala.io.readInt
var arr = Array[Project]=new Array[Project](n)
for(i<-1 to n)
{
print("Enter id = ")
var id = scala.io.readInt
print("Enter name = ")
var name = scala. io. StdIn. readLine()
print("Enter Location = ")
var location = scala. io. StdIn. readLine()
arr(i) = new Project(id,name,location)
}
print("Number Of Object Created = "+n);
}
}