How can I tell if a number is odd or even with events/code?

Like the title says. I'd like to be able to get a condition to trigger if variable X is an odd number. I seem to remember that there's a way, like if you have the number 73 and do some math magic stuff you get 1 returned while if it's 74 you get zero. I can't remember how though and I don't have the brainpower to figure it out by myself. Any help much appreciated

var % 2

Modulus

Thanks