Add zero only when empty precision in javascript

Question

I have a situation here in javascript

**Value**       **Expected**  **toFixed(2)**
var a = 0.0273 |  0.0273     |  0.03(X)
var b = 0.8    |  0.80       |  0.80
var b = 53.7   | 53.70       | 53.70

When four digits come after the decimal point, leave it as it is, but if a single digit comes, a zero should be appended.

toFixed() method didn't help me much.

this is your answer http://stackoverflow.com/a/15266797/1570534 — Hanky Panky, Aug 24 '15 at 08:31
you can split the number on the point : `var array=a.toString().split(".")` and then you can find if you need `toFixed()` or not : `if(array[1].length<2){ a.toFixed(2); } // no else is needed` — Majed DH, Aug 24 '15 at 08:31

score 0 · Answer 1 · edited May 23 '17 at 12:29

0

First you check the amount of decimals with:

var countDecimals = function (value) { 
    if ((value % 1) != 0) 
        return value.toString().split(".")[1].length;  
    return 0;
};

https://stackoverflow.com/a/17369384/1870760

Then you check if it's 4 or not and parse it with toFixed:

var a = 0.0273;

    var countDecimals = function (value) { 
        if ((value % 1) != 0) 
            return value.toString().split(".")[1].length;  
        return 0;
    };

if(countDecimals(a) < 4)
  a = (Math.round(a * 100) / 100).toFixed(2);

alert(a)

edited May 23 '17 at 12:29

Community

1
1

answered Aug 24 '15 at 08:39

Hatted Rooster

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thanks for the response. Don't we have any other option without the help of user defined methods? – gauti Aug 24 '15 at 09:41
To count decimals, no. – Hatted Rooster Aug 24 '15 at 09:44

Add zero only when empty precision in javascript

1 Answers1