We know that any intege that is divisible by 2 is an even number else the number is an odd.
The code below will check if a number is odd or even:
$number = 5; //your input
if( $number % 2)
echo 'A number is even';
echo 'A number is an odd';
In mathematics, % symbol denotes percentage(percent). But in computing, we call it modulo(sometimes called modulus). The modulo operation finds the remainder after division of one number by another.
6 % 3 ; //returns 0
3 % 2 ; //returns 1
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