A "Hello world" program is usually the very first program you write when learning a new programming language, it simply prints out the text "Hello World". Below are a few examples: PHP:
echo "Hello...
Ciao, mondo is an Italian equivalent of 'Hello, World'. The phrase in Italian is pronounced 'chow MOHN-doh'. The interjection 'ciao' means 'hello' and 'goodbye'. The masculine gender noun 'mondo'...