Kotlin REPL 算法

Question

I just got started with a book on Kotlin and guess what? yes I can't figure out anything. Here is the thing just by using REPL you can run part of your code and see if it runs without the need of creating a new file but I got a beautiful error message when I try to do min (43, -33), or any min(), max() and so on.

here is the error examples:

max(22, 33) error: unresolved reference. None of the following candidates is applicable because of receiver type mismatch:

min(93, -99) error: unresolved reference. None of the following candidates is applicable because of receiver type mismatch: public fun <T : Comparable<TypeVariable(T)>> Array<out TypeVariable(T)>.min(): TypeVariable(T)? defined in kotlin.collections public fun Array.min(): Double? defined in kotlin.collections

Thanks to all and appreciate any help!!!

Answer 1

The min() and max() funtions are not part of the core language, the are defined in the standard library in the kotlin.math package. You need to import the package, than you can use these methods:

import kotlin.math.*
min(22, 33)