Here is the script in full

<?php
/*
This function takes a whole number ($intnumber)
and then displays a message depending on whether
it is odd or even
*/
function OddOrEven($intNumber)
{
if ($intNumber % 2 == 0 )
{
//your number is even
echo "Your number is even<br>";
}
else
{
//your number is odd
echo "Your number is odd<br>";
}
}
//test the function with 2 values 40 and 3
OddOrEven(40);
OddOrEven(3);
?>

A note here for people coming from other languages , in particular Visual Basic or VBscript . The modulus operator is % and not MOD . If you program in more than one language this will catch you out from time to time.