how to avoid Javascript weird Float behavior?

Question

Why is it that trying to add 2.05 with 1.01 returns this value?

console.log(2.05+1.01); // -> 3.0599999999999996?

is using toFixed() the only way around it?

console.log((2.05+1.01).toFixed(2))

How can I avoid this behavior, so it won't get me by surprise in the inner calculations of my code.

what do you mean by 'weird' behavior? you can always format your float values the way you want it to display. — Cacho Santa, Sep 02 '15 at 00:59
why is this behavior weird? It's how floating point numbers to a certain precision always act — corvid, Sep 02 '15 at 01:03
If this is currency the easiest solution is to work in the smaller unit; `205 + 101 === 306` — Paul S., Sep 02 '15 at 01:35

score 1 · Answer 1 · answered Sep 02 '15 at 00:59

1

This is because javascript's floating point precision only goes up to 14 places. The only real ways around it are multiplying each number by a high number or doing what you said.

answered Sep 02 '15 at 00:59

Sheerforce

79
9

how to avoid Javascript weird Float behavior?

1 Answers1