How to format a float in javascript?
There are functions to round numbers. For example:
var x = 5.0364342423;print(x.toFixed(2));
will print 5.04.
EDIT:Fiddle
var result = Math.round(original*100)/100;
The specifics, in case the code isn't self-explanatory.
edit: ...or just use toFixed
, as proposed by Tim Büthe. Forgot that one, thanks (and an upvote) for reminder :)
Be careful when using toFixed()
:
First, rounding the number is done using the binary representation of the number, which might lead to unexpected behaviour. For example
(0.595).toFixed(2) === '0.59'
instead of '0.6'
.
Second, there's an IE bug with toFixed()
. In IE (at least up to version 7, didn't check IE8), the following holds true:
(0.9).toFixed(0) === '0'
It might be a good idea to follow kkyy's suggestion or to use a custom toFixed()
function, eg
function toFixed(value, precision) { var power = Math.pow(10, precision || 0); return String(Math.round(value * power) / power);}