HEEELP with 2.05/0.05 rez 40.99999999 WHYYY?

JavaScript
#1

I cant understand why it happens.
open console and type there:
let a = 2.05/0.05
and i got the rezult
40.99999999999999 ???

a = 2.10/0.05
will give me rezult
42

a = 0.15/0.05
2.9999999999999996

How it happens ? and what i need to write to get the calc rezults (0.15/0.05 must be 3 )???

#2

See this:

2 Likes
#3

You are a victim of floating point precision errors, see this site for some basic explanations of them:

https://www.floating-point-gui.de/basic/

Instead of floating point calculations, you can use fixed point with libraries like bignum or handle the precision yourselves

1 Like
#4

Thank u for ur answers. They help me very much.

#5