Problem: We wanted to determine if a number is even or odd

Notes: We know that even number end with 0, 2, 4, 6, 8 and odd numbers ends with 1, 3, 5, 7, 9. So how will we know if a number given is an even or odd number in a program..

Solution:

<?

$magic_number = 123568;

if($magic_number % 2 == 0) {

    print "The number is even.";

}  else {

    print "The number is odd.";

}

?>

Explanation: In the program above we use the modulus division. Modulus division unlike the ordinary division (/) returns the remainder instead of the quotient. So we tried modulo dividing the given number by 2 to determine if it is divisible by 2.