jquery multiplication with broken numbers

Question

i coded price * Qty function with jquery but not responding daily prices. They response decimal numbers.

Here is code;

 var qty = "3";
 var price = "1.20";
 var res = (qty*price);
 $("#boxres").html(res);

They result 3.5999999999999996

i want to only 3.6 how can i fix it ?

possible duplicate of [Is floating point math broken?](http://stackoverflow.com/questions/588004/is-floating-point-math-broken) — Dave, Sep 10 '14 at 17:43
Are you trying to round the number? Also, the only jQuery in your code is the last line, and has nothing to do with your actual question or the answer. — Reinstate Monica -- notmaynard, Sep 10 '14 at 22:19
lol, i solved with toFixed(1) but round not solve my problem — Emrah Özdemir, Sep 11 '14 at 02:18

score 2 · Answer 1 · answered Sep 10 '14 at 17:45

2

Store things in pennies:

var qty = 3;
var cost = 120;
var res = cost * qty;
var res_str = '£'+Math.floor(res / 100)+'.'+(res %100).toFixed(2);

answered Sep 10 '14 at 17:45

Eric

score 1 · Accepted Answer · answered Sep 10 '14 at 17:47

1

try

$("#boxres").html(res.toFixed(1));

answered Sep 10 '14 at 17:47

Chris Rosete

score 0 · Answer 3 · answered Sep 10 '14 at 17:45

0

Use Math.round

var res = (Math.round((qty*price)*10)/10).toFixed(2);

Edit to force to the 100th. Thanks dave.

answered Sep 10 '14 at 17:45

TyMayn

3 Answers3