Question

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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?

Answer 1

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';