How as a round number?

Question

I need a round to two number after comma. example

5000.0000 to 5000

5000.123 to 5000.12

5000.136 to 5000.13

how do this?

I need function x.toFixed(2); but if at the end of two zero, then they should not show

I think you want to round after "dot" you specified after comma" — Miqdad Ali, Jun 05 '12 at 09:30
@MiqdadAli: Not all countries use a decimal dot. For example, in Germany we use `123.456.789,12345` (actually, the official way is `123 456 789,12345` but most people use dots anyway - but the decimal point is always the comma) — ThiefMaster, Jun 05 '12 at 09:31
Possible Duplicate: **[JavaScript: formatting number with exactly two decimals](http://stackoverflow.com/questions/1726630/javascript-formatting-number-with-exactly-two-decimals)** — Siva Charan, Jun 05 '12 at 09:33
@ThiefMaster, true enough, but he did use periods/dots in his question. — David Thomas, Jun 05 '12 at 09:34
@SiGanteng I could, but then again OP should google for it in the first place. It is common knowledge after all. — freakish, Jun 05 '12 at 09:57

score 0 · Answer 1 · answered Jun 05 '12 at 09:33

0

You can use this javascript function to round the number

function roundNumber(rnum, rlength) { 
  var newnumber = Math.round(rnum*Math.pow(10,rlength))/Math.pow(10,rlength);
return parseFloat(newnumber);
}

var num = roundNumber(5000.0000,0);   //will return 5000

answered Jun 05 '12 at 09:33

Miqdad Ali

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roundNumber(5000.0000,2); // will return 5000.00 – Miqdad Ali Jun 05 '12 at 09:33

score 0 · Answer 2 · answered Jun 05 '12 at 09:33

0

As @freakish suggests, toFixed is good idea to round numbers. If you want to floor it, I suggest

parseInt(5000.136*100)/100;

answered Jun 05 '12 at 09:33

Jan Turoň

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freakish · Answer 3 · 2012-06-05T21:03:52.607

0

Since x.toFixed(2) returns a string you may do something like this:

function cut(str) {
    if (str[str.length-1] == "0")
        return str.substr(0, str.length-1);
    if (str[str.length-1] == ".")
        return str.substr(0, str.length-1);
    return str;
}

x = cut(cut(cut(x.toFixed(2))));

Not the most elegant (for example you could add the function to string's prototype), but definetly working.

edited Jun 05 '12 at 21:03

answered Jun 05 '12 at 20:58

freakish

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score -1 · Answer 4 · answered Jun 05 '12 at 09:32

-1

This link can help you

http://www.w3schools.com/jsref/jsref_tofixed.asp

Example

Convert a number into a string, keeping only two decimals:

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

The result of n will be:

5.57

answered Jun 05 '12 at 09:32

Sahal

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How as a round number?

4 Answers4