odd or even

How do I distinguish the odd and even in an if statement:

for($i=0; $i<count($spanId); $i++){
	if((count($spanId[$i]) % 2) == 0){
		$beginIllustratorNav = "<span id = \"".$spanId[$i]."\" style=\"float: right; margin: 5px; display: block; width: ".$spanWidth[$i]."px; height: ".$spanHeight[$i]."px; border: 1px solid #F6F5E3;\" >";
		}else{
		$beginIllustratorNav = "<span id = \"".$spanId[$i]."\" style=\"float: left; margin: 5px; display: block; width: ".$spanWidth[$i]."px; height: ".$spanHeight[$i]."px; border: 1px solid #F6F5E3;\" >";
		}
...
}

PHP:

 

if ($num % 2 == 0) {
    //Number is even
}
else {
    //Number is odd
}

PHP:

 

if(($i) % 2) == 0){

But for some reason it gives me error:

 

Your brackets don't match up. Add another bracket at the start ("if ((($i) % 2) == 0)").

 

Bingo! thanks!

 

You can also do it this way:

if ($i & 1)
{
    // is odd
}
else
{
    // Is even
}

PHP: