Kotlin gives wrong result when multipliyng

Question

I want to multiply 281.65 by 100 and get 28165, I execute:

fun main(args: Array<String>) {
    println("${281.65 * 100}")
}

but I get 28164.999999999996 Whats the problem here and how do I get 28165 as a result? Is there a good Kotlin way to work with that?

Possible duplicate of [Is floating point math broken?](https://stackoverflow.com/questions/588004/is-floating-point-math-broken) — Kyll, Sep 24 '19 at 16:52

score 8 · Answer 1 · answered Sep 24 '19 at 17:10

8

Yep, it's floating point math issue.

kotlin.math package has roundToLong extension function which helps in this case.

(281.65 * 100).roundToLong()

answered Sep 24 '19 at 17:10

Rainmaker

1 Answers1