How to round floating point error in javascript

Question

How to round floating point error in javascript?

qwertymk · Accepted Answer · 2011-03-02 14:05:17Z

3

use toFixed to round it then convert it back to a number

var num = 1.00000000000000002341;
alert(+num.toFixed(10));

answered Mar 2, 2011 at 14:05

qwertymk

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Comments

Mike Samuel · Accepted Answer · 2011-03-02 14:27:39Z

0

To round towards 0 to get a 32 bit signed integer, use x | 0.

There's also the Math.round function which rounds towards the closest integer.

answered Mar 2, 2011 at 14:27

Mike Samuel

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pimvdb · Accepted Answer · 2011-03-02 15:03:14Z

0

You could use Math.round(number * 1E6) / 1E6 to round up to 6 decimal places.

answered Mar 2, 2011 at 15:03

pimvdb

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