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Scala Hello World! 

Scala Hello World! 



Click on RUN button to see the output

Scala Online Compiler

Write, Run & Share Scala code online using OneCompiler's Scala online compiler for free. It's one of the robust, feature-rich online compilers for Scala language, running on the latest version 2.12.6. Getting started with the OneCompiler's Scala compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as Scala. OneCompiler also has reference programs, where you can look for the sample programs and start learning. Happy learning!!

Read input from STDIN in Scala

OneCompiler's Scala online editor supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample Scala program which takes name as input and prints hello message with your name.

object Hello {
	def main(args: Array[String]): Unit = {
	  val name = scala.io.StdIn.readLine()        // Read input from STDIN
    println("Hello " + name ) 

About Scala

Scala is both object-oriented and functional programming language by Martin Odersky in the year 2003.

Syntax help


Variable is a name given to the storage area in order to identify them in our programs.

var or val Variable-name [: Data-Type] = [Initial Value];

Loops and conditional statements

1. If family:

If, If-else, Nested-Ifs are used when you want to perform a certain set of operations based on conditional expressions.




if(conditional-expression) {  
//code if condition is true  
} else {  
//code if condition is false  


if(condition-expression1) {  
//code if above condition is true  
} else if (condition-expression2) {  
//code if above condition is true  
else if(condition-expression3) {  
//code if above condition is true  
else {  
//code if all the above conditions are false  

2. For:

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

for(index <- range){  
  // code  

3. While:

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

while(condition) {  
 // code 

4. 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) 


Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity.

def functionname(parameters : parameters-type) : returntype = {   //code


You can either use = or not in the function definition. If = is not present, function will not return any value.

Help us with your feedback!

Reference Programs:


No tags available for Scala

How to use?

Choose the language in which you want to run your program, by clicking the button next to Run. And then write your code in the code box, You can use the auto complete snippets and warnings and errors which helps you to write better code faster way.
Once you are done writing your code click the Run button, now the code will be submitted to OneCompiler and you will see the results in a second.

How to contribute?

Please fork OneCompiler repository and contribute us by adding more languages or the features to the existing OneCompiler backend.
You can also contibute to the community by adding more programs which users can search and use as base code for their programs.

API & More

You can embed OneCompiler into your own website. That helps your website users to write and test their programs within your website.
If you want to run and see the results from your backend you can utilize the OneCompiler API by integrating it with your backend.