Syntax Highlighting!

# Hello world for the Unix shells (sh, ksh, csh, zsh, bash, fish, xonsh, ...)
echo Hello World

// Hello World in JavaScript
document.write('Hello World');

// Hello world in PHP
echo 'Hello World!';

# Hello world in Python 2
print "Hello World"
# Hello world in Python 3 (aka Python 3000)
print("Hello World")

# Hello World in Ruby
puts "Hello World!"