Hello, world!

A '''"Hello, world!" program''' is a trivial program which outputs a static string of text, usually

Hello, world!

This program is often the first one written in a new esoteric programming language, to demonstrate output. It is a popular problem.

The program comes from the first example program in the classic K&R C manual. Note that the K&R version was in all lowercase and lacked an exclamation mark.

External resources

 * The Hello World Collection, a collection of 490+ Hello World programs
 * Hello World article on Wikipedia