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How to swap two numbers in Kotlin

To Swap 2 numbers in Kotlin we can declare a third temporary variable.

Assuming we have a = 1, b =2

And Temporary variable called x

1- We set value of temporary from first variable. x = 1 (a)
2- We set value of First variable from Second variable. a = 2 (b)
3- We set value of second variable from temporary variable b = 1 (x)


import java.util.*

fun main(arg: Array<String>) {
    var first = 1;
    var second = 2;    
    println("Numbers Before Swap : first = $first second = $second ")
    var temp = first
    first = second
    second = temp
    println("Numbers After  Swap : first = $first second = $second ")


Numbers Before Swap : first = 1 second = 2
Numbers After Swap : first = 2 second = 1


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