Question

Write a recursive method pow(x, y) to calculate x^y, where x and y are positive integers. If x=2, y=4, the method pow should return 16. Java answers only please.

Answer 1

import java.util.*;
public class Main {
        public static int calculatePower(int a,int b)
        {
        if(b==0) return 1;
        else if(b==1) return a;
        else
        return a * calculatePower(a,b-1);
}
        public static void main(String[] args) {
        Scanner scr=new Scanner(System.in);
        int x,y,z;
        System.out.print("\nTo calculate x^y , value of x :");
        x=scr.nextInt();
        System.out.print("\nValue of y :");
        y=scr.nextInt();
        z=calculatePower(x,y);  
        System.out.print("\nx^y :"+z);
        }
}

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