how to round summ of two inputs with jquery

Question

I have this function:

function doCalc() {
  var total = 0;
  $('tr').each(function() {
      $(this).find('span.amount').html($('input:eq(0)', this).val() * $('input:eq(1)', this).val());
  });    
} 

$(this).keyup(doCalc);

and for example if I multiply 12 * 1.90 it always shows 22.799999999999997 How to format it to 22.80 ? Thanks in advance

duplicate: http://stackoverflow.com/questions/1726630/javascript-formatting-number-with-exactly-two-decimals — ruuter, Apr 24 '13 at 07:07

score 4 · Accepted Answer · answered Apr 24 '13 at 07:05

4

var num = 5.56789;
var n=num.toFixed(2);

The result of n will be: 5.57

answered Apr 24 '13 at 07:05

Anshuman Jasrotia

3,135
8
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81

I tried this and it is working but where to apply toFixed(2); in my code? sorry for being ... :) – user1820186 Apr 24 '13 at 07:06
Try this $(this).find('span.amount').html(($('input:eq(0)', this).val() * $('input:eq(1)', this).val()).toFixed(2)); – Anshuman Jasrotia Apr 24 '13 at 07:08
You should add toFixed(2) also to first input. Otherwise if first number will be for example 7.9, you again have same problem. So answer to @user1820186 is to add toFixed(2) to all input values. ps. I see no one accepted. – ruuter Apr 24 '13 at 07:12
I have added toFixed() to the product of two inputs so there is no need to add it separately to individual inputs. – Anshuman Jasrotia Apr 24 '13 at 07:14

score 3 · Answer 2 · answered Apr 24 '13 at 07:05

3

you can use toFixed

var test = 10.231;
alert(test.tofixed(test))

returns 10.23

answered Apr 24 '13 at 07:05

Joel Harkes

10,975
3
46
65

score 2 · Answer 3 · answered Apr 24 '13 at 07:06

2

You can multiply the result by 100 and then divide by 100.

or you can also use result.toFixed(2);

answered Apr 24 '13 at 07:06

how to round summ of two inputs with jquery

3 Answers3