Write a Java program to calculate power of a number using recursion.
import
java.io.*;
public
class powernum {
public static int power(int base, int exp){
if (exp !=0){
return (base * power(base, exp-1));
}else {
return 1;
}
}
public static void main(String args[]){
Scanner sc = new Scanner(System.in);
System.out.println("Enter the base
number :");
int base = sc.nextInt();
System.out.println("Enter the
exponent number :");
int exp = sc.nextInt();
System.out.println("Output :
"+power(base, exp));
}
}
C:\Program
Files\Java\jdk1.7.0_80\bin>javac powernum.java
C:\Program
Files\Java\jdk1.7.0_80\bin>java powernum
Enter
the base number : 7
Enter
the exponent number : 2
Output : 49
