Double? Integer? — PHP

Question

The following code generates two random decimal values, then subtracts them to get $c.

$a = mt_rand(5, 75);
$b = mt_rand(5, 75);
$adjuster = mt_rand         


        

Answer 1

Do something like this to see if $c is a whole number (possibly stored as a double):

if(intval($c) == $c) {
    echo "I'm a whole number";
}

See here: http://3v4l.org/ubPK4

Answer 2

A double subtracting a double results in a double, even if that number is a whole number

$c = (int) ($b - $a);