I want to check if a value is a multiple of a certain number, for example, multiples of 10, but I also want to be able to change it to whatever I want.

if (directWinner == 10){

}

I want to check if a value is a multiple of a certain number, for example, multiples of 10, but I also want to be able to change it to whatever I want.

if (directWinner == 10){

}

• javascript

• 2 This does have absolutely nothing to do with jQuery. – Bergi Commented Mar 25, 2013 at 15:00
• 5 Amazing. Staggering. doxdesk.com/img/updates/20091116-so-large.gif – Matt Ball Commented Mar 25, 2013 at 15:00
• -1 all the answers, not enough jQuery. – BinaryTox1n Commented Mar 25, 2013 at 15:04

3 Answers 3

You'd use the modulus operator for that :

if (directWinner % 10 === 0){
    directWinner = 20;
}

Added a small dose of jQuery for no good reason at all ?

$.modu = function(check, against) {
    return check % against === 0;
}

if ( $.modu(directWinner, 10) ) {
    directWinner = 20;
}

You'd use the modulo operator % for that:

var certainNumber = 10;
if (directWinner % certainNumber === 0) {
    // directWinner is a multiple of certainNumber
}

Use the modulo operator (assuming positive integers) :

if (directWinner % 10 === 0) {
    ...
}