Hello World!

Printing hello world is a time honored tradition of developer.  Allegedly, the tradition was introduced in 1978 as an example in the book The C Programming Language, by Dennis Ritchie and Brian Kernighan. Here is hello world in a few different languages.

C

	#include<stdio.h>
	main()
	{
	printf("Hello World");
	}

view raw helloWorld.c hosted with by GitHub

JavaScript

console.log('Hello World!')

view raw helloWorld.js hosted with by GitHub

Note: If you are using node, you can run your hellWorld.js script from the command line like so:

$node helloWorld.js

view raw helloWorld.sh hosted with by GitHub

PHP

	<?php
	print 'Hello World!'
	//or
	echo 'Hello World!'
	?>

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Python

print 'Hello World!'

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Java

	public class HelloWorld {
	public static void main(String[] args) {
	System.out.println("Hello, World");
	}
	}

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c++

	#include <iostream>
	int main()
	{
	std::cout << "Hello, world!\n";
	}

view raw hellWorld.cpp hosted with by GitHub

NASM (Assembly)

	; ----------------------------------------------------------------------------------------
	;Source: http://cs.lmu.edu/~ray/notes/x86assembly/
	;Writes "Hello, World" to the console using only system calls. Runs on 64-bit Linux only.
	; To assemble and run:
	;
	; nasm -felf64 hello.asm && ld hello.o && ./a.out
	; ----------------------------------------------------------------------------------------
	global _start
	section .text
	_start:
	; write(1, message, 13)
	mov rax, 1 ; system call 1 is write
	mov rdi, 1 ; file handle 1 is stdout
	mov rsi, message ; address of string to output
	mov rdx, 13 ; number of bytes
	syscall ; invoke operating system to do the write
	; exit(0)
	mov eax, 60 ; system call 60 is exit
	xor rdi, rdi ; exit code 0
	syscall ; invoke operating system to exit
	message:
	db "Hello, World", 10 ; note the newline at the end

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