Why the code below with input value 36, output is 4 but not 1?

Question

So, I can't solve it. Please help me?
https://code.sololearn.com/W554eG5rM5pa/?ref=app

Answer 1

Yes, it is really works fine. Thanks to You, Abhay

Answer 2

This should work fine,
var nmbrvol=
(numberVolunteers% 5==0)?0:5-numberVolunteers%5;
console.log(nmbrvol);