Kotlin Double

Question

Well, if you know, the shipping task after quiz #3 is kinda weird for me, just because:

Expected output:
29.945 (forgot the number, but it won't affect me to explain)

My output:
29.945000000003

How to round the number to 3 decimals after a dot? Is there in Kotlin some functions for this?

Answer 1

It's a popular issue in the most of the programming languages. This topic is different but same concept. Take a look at this thread

https://www.sololearn.com/Discuss/1288636/?ref=app

Answer 2

var num: Double = String.format("%.3f", 29.9450000003).toDouble()
println(num)

But, I think we don't need to use this for that task. Can we see your code?

Answer 3

Instead of a/100*15 try a*15/100 to avoid these kind of floating points errors.

Answer 4

Simba yeah, sure
https://code.sololearn.com/cMAbTjcGJTwB/?ref=app

Answer 5

Simba why do they appear?