java

import java.io.*; class PowerOfANumber {     public static void main(String [] args){         int x=5,y=5;         System.out.println(power(x,y));     }     public static int power(int x , int y){         if(y==0)             return 1;         else if(y%2==0)             return power(x,y/2)*power(x,y/2);         else             return x*power(x,y/2)*power(x,y/2);     } }