How to avoid math rounding errors in Javascsript Browser environments

Question

I´ve come across this oddity when writing some JS code. It happens in both Chrome and Firefox:

10.04 + 0.01 = 10.049999999999999

Chrome

Firefox

Not sure if I´m just missing something obvious that causes this?

Right now I am handling it with rounding the number afterwards - Is there a better way to avoid this bug/feature?

A common solution is to work with them as integers. do all the math using the number as ints 1004 + 001. Once you have to print the number divide it by 100 — Nicolas Castellanos, Jan 15 '23 at 21:14
https://stackoverflow.com/questions/1458633/how-to-deal-with-floating-point-number-precision-in-javascript — Nicolas Castellanos, Jan 15 '23 at 21:15

score 0 · Answer 1 · answered Jan 15 '23 at 21:04

0

This is a consequence of the way numbers are stored internally in IEEE 754 form.

To avoid this, use a BigDecimal library such as this one: https://www.npmjs.com/package/js-big-decimal

answered Jan 15 '23 at 21:04

Andrew Parks

1 Answers1