Square Root in Swift

Question

Since the Swift compiler in the PlayGround here, doesn't have sqrt() (..\Playground\:1:10: error: use of unresolved identifier 'sqrt')
I wrote one myself (not that accurate, but will do for what I need now...
But after testing it in Xcode, I transferred it to the PlayGround hare, it has errors I don't even know how to begin understanding...
https://code.sololearn.com/cIcdrTfnQQwj/#swift
Can anyone help please?
TIA
Ronen

Answer 1

So you can't even import Foundation here...
But, what's important is that now it works!
I have a function that finds a square root of an Int, up to the 2nd decimal place!

Answer 2

SL code playground is limited