even numbers...

[ErikN]

Is there a way to tell whether a number is even or odd? I'd like to set something up where if the number is even, it does something, and if the numbers odd, then it does something else...

[tress]

maybe something like

function is_even($num)
{
    return ($num&1)?0:1;
} 

[Arielladog]

Hey guys,

There are MANY ways to do this, but there is an operator that in my opinion was meant to handle this kind of stuff. The modulus operator (%) returns the remainder after division:

2%2 == 0

5%3 == 2

25%6 == 1

Etc... So, an even number is divisible by 2 without a remainder. So, if n is out number, we can say:

if(n%2==0){
// number is even
}else if(n%2==1){
// number is odd
}

Hope that helps,
aDog

[DR_LaRRY_PEpPeR]

i prefer the bitwise and operator myself. as you get into bigger numbers it's a little faster than modulus. just and a number by 1 to see if it's even.

if ($num & 1) { /* it's even*/ } 

[ErikN]

I used DR_LaRRY_PEpPeR's because it's shorter and it works...but thanks everybody for helping