Math - Divide & leave remainder

Question

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Integer division in JavaScript

Hopefully this is a simple question, basically I need to do this:

divider = 15

number = 50

Obviously 15 can be divided into 50 3 times with a remainder of 5, is there a simple way I can achieve this with math?

Obviously just dividing 50 by 15 will give me a rounded figure which I just want the lowest possible result and if there is anything left over and it's less than 15 just leave it alone.

Any help?

Cheers, Shannon

EDIT:

Thanks to Adil:

x = 50;
y = 15;
res = x % y;
x = (x - res) / y;
// x = 3

Just had a look at your link @FelixKling, `Math.floor(y/x)` works perfectly too, didn't even know this existed in javascript. Cheers — Shannon Hochkins, Dec 27 '12 at 11:25
Also have a look at the comments though, since `.floor` won't work in this case for negative results. — Felix Kling, Dec 27 '12 at 11:25

score 14 · Accepted Answer · edited Dec 28 '12 at 11:28

14

You can use modulus operator % to get remainder after division.

Live Demo

remainder = 50 % 15;

edited Dec 28 '12 at 11:28

Mark Dickinson

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answered Dec 27 '12 at 11:10

Adil

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1

You should get 3 as x-res = 45 and dividing 45 by 15 gets you 3, http://jsfiddle.net/rajaadil/XNhec/1/ – Adil Dec 27 '12 at 11:32

score 0 · Answer 2 · answered Dec 27 '12 at 11:11

0

To get the left over use the modulo. (division remainder)

x= 50 % 15

answered Dec 27 '12 at 11:11

Hugo Delsing

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Math - Divide & leave remainder

2 Answers2