1. Backbone.js
- var AppView = Backbone.View.extend({ el: $('#container'), // template which has the placeholder 'who' to be substitute later. template: _.template("<h3>Hello <%= who %></h3>"), initialize: function(){ this.render(); render: function(){ // render the function using substituting the varible 'who' for 'world!'.
 
 
2. Bash
echo "Hello World"
 
3. Basic
PRINT "Hello, world!"​
 
4. C
#include 
 
int main(void)
{
    puts("Hello, world!");
}
 
5. C++
#include 
 
int main()
{
    std::cout << "Hello, world!
";
    return 0;
}
 
6. C#
using System;
class Program
{
    public static void Main(string[] args)
    {
        Console.WriteLine("Hello, world!");
    }
}
 
7. Clipper
? "Hello World"
 
8. CoffeeScript
console.log 'Hello, world!'
 
9. Delphi
program HelloWorld;
begin
  Writeln('Hello, world!');
end.
 
10. HTML

 Hello World!
 
11. Java
import javax.swing.JFrame;  //Importing class JFrame
import javax.swing.JLabel;  //Importing class JLabel
public class HelloWorld {
    public static void main(String[] args) {
        JFrame frame = new JFrame();           //Creating frame
        frame.setTitle("Hi!");                 //Setting title frame
        frame.add(new JLabel("Hello, world!"));//Adding text to frame
        frame.pack();                          //Setting size to smallest
        frame.setLocationRelativeTo(null);     //Centering frame
        frame.setVisible(true);                //Showing frame
    }
}
 
12. JavaScript
document.write('Hello, world!');
 
13. jQuery
$("body").append("Hello world!");
 
14. Julia
println("Hello world!")
 
15. Logo
print [Hello, world!]
 
16. MatLab
disp('Hello, world!')
 
17. Objective-C
#import 
#import 
 
int main(void)
{
    NSLog(@"Hello, world!
");
    return 0;
}
 
18. Pascal
program HelloWorld;
begin
  WriteLn('Hello, world!');
end.
 
19. Perl 5
print "Hello, world!
";
 
20. PHP

 
 
21. Processing
void setup(){
  println("Hello, world!");
}
 
22. Python
print "Hello, world!"
 
23. R
cat('Hello, world!
')
 
24. Ruby
puts "Hello, world!"
 
25. Swift
println("Hello, world!")
 
26. VBScript
MsgBox "Hello, World!"
 
27. Visual Basic .NET
Module Module1
    Sub Main()
        Console.WriteLine("Hello, world!")
    End Sub
End Module
 
28. XSLT
      Hello World