A "Hello world" program is a computer program that outputs "Hello world" on a display device. Because it is typically one of the simplest programs possible in most programming languages, it is by tradition often used to illustrate to beginners the most basic syntax of a programming language, or to verify that a language or system is operating correctly.
This is a hello world program written using Google Gadget technology:
<?xml version="1.0" encoding="UTF-8" ?>
<ModulePrefs title="simple hello world example" />