How do I determine if a number is a whole number?

[timbr8ks]

How do I determine in PHP if a number is a whole number?

I'm creating rows of information, and I want every other row to be shaded. So, I assign $n a value for each row and increase it by 1 each time. I divide $n/2 to determine if it's a whole number, and if it is, I shade the row. So, how do I determine if $n/2 is a whole number?

[Jayson]

if($n/2 == floor($n/2)) {
    [i]$n/2 is whole[/i]
}
else {
    [i]$n/2 is not whole[/i]
}

Here's what I do though, for an alternative method:

$color = !$color;
if($color) {
    $background = '#c0c0c0';
}
else {
    $background = '#ffffff';
}

[wilsonodk]

// Here is one way
if (($n % 2)==0) echo "I am a whole number";
// Here is another way
if (is_int($n/2)) echo "I am a whole number";
// Here is a round about way
if (!is_float($n/2)) echo "I am not a floating decimal number";

HTH

[greg252]

I prefer modus, just because I never get to use it.