How to format comma separated value to two decimal places

Question

How can I convert the comma separated value with some decimal value round off to two places.

Example:
var number = '4,500.02734'
output: 4, 500.03

Possible duplicate of [Format number to always show 2 decimal places](http://stackoverflow.com/questions/6134039/format-number-to-always-show-2-decimal-places) — Samuel, May 11 '17 at 01:32
I agree with @guradio. Use `var n = 4.005` and `n.toFixed(2)` would round to nearest hundredth. — , May 11 '17 at 01:34
yes toFixed can convert number without comma. But I am asking for number with comma. — sanin, May 11 '17 at 01:36
@Samuel, i dont think my question is duplicate. I am asking about the comma separated number as amount figure with decimal value — sanin, May 11 '17 at 01:39

score 4 · Accepted Answer · answered May 11 '17 at 01:46

This requires two operations...

Parse the number string into a Number instance

const actualNumber = +number.replace(/,/g, '') // produces 4500.02734

Format the string to a given locale with a maximum of 2 decimal places

const formatted = actualNumber.toLocaleString('en-US', {maximumFractionDigits: 2})

var number = '4,500.02734'

const actualNumber = +number.replace(/,/g, '')
const formatted = actualNumber.toLocaleString('en-US', {maximumFractionDigits: 2})

document.write(formatted)

score 3 · Answer 2 · answered May 12 '17 at 04:36

You can use this simple function that will convert your number to comma separated value and decimal number round off as well.

var number = 5000000.245;
document.write(format_number(number));

function format_number(n) {
  return n.toFixed(2).replace(/(\d)(?=(\d{3})+\.)/g, "$1,");
}

score 1 · Answer 3 · answered May 11 '17 at 01:45

1

function format(a) {
    var i=a.indexOf(".");
    var f=(parseFloat("0"+a.substring(i)).toFixed(2)).toString();
    return a.substring(0,i)+"."+f.substring(2,f.length);
}

format("4,500.02734") outputs 4,500.03.

answered May 11 '17 at 01:45

Richard Yan

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Thank you very much – sanin May 11 '17 at 01:47

How to format comma separated value to two decimal places

3 Answers3