Display HTML 

				<html>
					<head>
						<title>This is title
						</title>
					</head>
					<body>
						Hello world
						<!--This is comment section for demo-->
					 </body>
				</html>

Display JQuery / JavaScript

(highlight line number: [2,4,6,7]) 
				$(document).ready(function(){
					$("#msgid").html("This is Hello World by JQuery");
					//This is single line comment section for demo
					/* 
					This is multiline
					comment
					*/
				});

Display Java 

				package helloworld;
				public class HelloWorld {
					public static void main(String[] args) {
						// Comment: Prints "Hello, World" to the terminal window.
						System.out.println("Hello, World");
					}
				}

Display Python

(line numbering started from -1) 
				#! python
				'''
				Multiline comment demo
				'''
				# range function
				print range(10)
				print range(5, 10)
				print range(0, 10, 3)
				a = ['Mary', 'had', 'a', 'little', 'lamb']
				for i in range(len(a)):
					print i, a[i]