String formatting with JavaScript

Question

I have numbers in table and need to format them with JavaScript (2 symbols after dot). This code works but I guess there are more efficient and elegant ways:

var str = "126389471.74000001";
var dotIndex = str.indexOf(".");
var formattedStr = str.substring(0, dotIndex+3);

Could anybody suggest better solution?

Insyte · Accepted Answer · 2018-11-03 23:29:34Z

5

You're looking for toFixed

var str = "126389471.74000001";
var formattedStr = parseFloat(str).toFixed(2); // 2 dp

edited Nov 3, 2018 at 23:29

answered Mar 13, 2014 at 11:55

Insyte

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Comments

BenM · Accepted Answer · 2014-03-13 11:55:53Z

1

Why do you treat them as strings in the first place? It would be much better to use JavaScript to automatically handle this with toFixed():

var num = 126389471.74000001,
    formatted = num.toFixed(2);

jsFiddle Demo

If you absolutely have to treate it as a string, use parseFloat() and the same method:

var formatted = parseFloat(num).toFixed(2);

answered Mar 13, 2014 at 11:55

BenM

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