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Kotlin program to calculate the power of a number using recursion

Kotlin | Power calculation program: Here, we are going to learn how to calculate the power of a given number using recursion in Kotlin programming language?
Submitted by IncludeHelp, on April 27, 2020

Given two numbers (base, power), we have to calculate base to the power of power.

Example:

    Input:
    base = 2
    power = 3

    Output:
    8

Program to calculate the power of a number using recursion in Kotlin

package com.includehelp.basic

import java.util.*


//function to calculate power using recursion
fun calPower(baseValue: Int, powerValue: Int): Int {
    return if (powerValue != 0)  baseValue * calPower(baseValue, powerValue - 1) else 1
}

//Main Function entry Point of Program
fun main(args: Array<String>) {
    //Input Stream
    val scanner = Scanner(System.`in`)

    //input Base integer number
    print("Enter Base Number  : ")
    val base: Int = scanner.nextInt()


    //input Power integer number
    print("Enter Power Number  : ")
    val power: Int = scanner.nextInt()


    //Call function to Calculate Power using recursion
    val res = calPower(base,power)

    //Print Result
    println("$base^$power = $res")
}

Output

Run 1:
Enter Base Number  : 5
Enter Power Number  : 3
5^3 = 125
-------
Run 2:
Enter Base Number  : 6
Enter Power Number  : 4
6^4 = 1296
-------
Run 3:
Enter Base Number  : 7
Enter Power Number  : 0
7^0 = 1