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Kotlin program to swap two numbers

Kotlin | Swap two numbers: Here, we are going to learn how to swap two given numbers in Kotlin programming language?
Submitted by IncludeHelp, on April 20, 2020

Given two numbers, we have to swap them.

Example:

    Input:
    First number: 10
    Second number: 20

    Output:
    First number: 20
    Second number: 10

To swap two numbers – here we are using third variable/temporary variable (consider – first contains the first number, second contains the second number and temp is a temporary variable).

• Assign the first number (first) to the temporary variable (temp)
• Now, assign the second number (second) to the variable first.
• Now, assign the temp (that contains the first number) to the second.
• Finally, values are swapped, print them on the screen.

Program to swap two numbers in Kotlin

package com.includehelp.basic

import java.util.*

// Main Method Entry Point of Program
fun main(arg: Array<String>) {
    // InputStream to get Input
    var reader = Scanner(System.`in`)
    
    // Input two values
    println("Enter First Value : ")
    var first = reader.nextInt();
    println("Enter Second Value : ")
    var second = reader.nextInt();    
    
    println("Numbers Before Swap : \n first = $first \n second = $second ")
    
    //Code for Swap Numbers
    var temp = first
    first=second
    second=temp
    
    println("Numbers After  Swap : \n first = $first \n second = $second ")
}

Output

Run 1:
Enter First Value :
45
Enter Second Value :
12
Numbers Before Swap :
 first = 45
 second = 12
Numbers After  Swap :
 first = 12
 second = 45