I need to have 2 symbols after dot

Question

Possible Duplicate:
How can I format numbers as money in JavaScript?
Format number to always show 2 decimal places
How do I round to 2 decimal places?

In PHP I can do the following to round to 2 decimal places;

$number = 3.45667;
$result = number_format($number, 2, '.', ''); // 3.46

How can I do the same in JavaScript?

You accepted an ugly and invalid solution. Good job! – Alexey Lebedev Nov 22 '11 at 13:51 — Alexey Lebedev, Nov 22 '11 at 13:51

score 7 · Answer 1 · answered Nov 22 '11 at 13:36

7

var number = 3.45667;
number.toFixed(2)
// returns "3.46"

toFixed() is the number of digits to appear after the decimal point. It will also pad on 0's to fit the input size.

answered Nov 22 '11 at 13:36

Russell Dias

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Linus Kleen · Accepted Answer · 2011-11-22T14:01:05.497

6

var number = 3.45667;
number = Math.round(100 * number) / 100;

This will however not quite work like PHP's number_format(). I.e. it will not convert 2.4 to 2.40. In order for that to work, you'll need a little more:

number = number.toString();
if (!number.match(/\./))
    number += '.';
while (!number.match(/\.\d\d$/))
    number += '0';

edited Nov 22 '11 at 14:01

answered Nov 22 '11 at 13:36

Linus Kleen

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no need to convert 2.4 to 2.40. I only need not to exceed 2 symbols after dot. will it work? – pzztzz Nov 22 '11 at 13:39
Yes, @pzztzz. Just fire it up in the Firebug console or on JSfiddle. – Linus Kleen Nov 22 '11 at 13:41
2

Your first solution is incorrect. Consider how it works for 0.005 – Alexey Lebedev Nov 22 '11 at 13:47

score 1 · Answer 3 · answered Nov 22 '11 at 13:37

1

You can use the below code

var number = 3.45667;
number.toFixed(2);

If you want to use rounding you'd multiply by 100 first, then round and divide by 100.

answered Nov 22 '11 at 13:37

Munter

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@Matt, rounding is exactly what was asked for. – Alexey Lebedev Nov 22 '11 at 13:42
@AlexeyLebedev: I imagine Matt was referring to the last sentence in the answer, which would be unnecessary because `toFixed()` does round. – RightSaidFred Nov 22 '11 at 13:57
Well, If he wanted floor or ceil he'd need to use the Math object – Munter Nov 22 '11 at 14:02

score 0 · Answer 4 · answered Nov 22 '11 at 13:38

the simple version: use .toFixed() like this:

var num= 3.45667;
num.toFixed(2); // 3.46

the complicated version, if you want the exact behaviour of number_format() is using this method from php.js:

var num= 3.45667;
number_format($number, 2, '.', ''); // 3.46

I need to have 2 symbols after dot

4 Answers4