Without using the modulo operator you’d essentially have to reimplement it. Divide the number by 2 and round down. Multiply that by 2 and then subtract it from the original number.
isEven(10) results in 10-10==0 (true) whereas isEven(13) results in 13-12==0 (false).
That would be isPositive.
Without using the modulo operator you’d essentially have to reimplement it. Divide the number by 2 and round down. Multiply that by 2 and then subtract it from the original number.
isEven(10) results in 10-10==0 (true) whereas isEven(13) results in 13-12==0 (false).
function isEven(n){ n = Math.abs(n) return (n - (Math.floor(n/2) * 2)) == 0 }Minor simplification: this works even without taking absolute value first of you use fix instead of floor.
Edit: I don’t know if fix is in the stock math library on second thought…
Yep! I’m wrong. Pretty embarrassing!
That’s a nice solution though! Gonna have to try and remember that one!