public class PowerExample {

    public static void main (String[] argv)
    {
        int p = power (3, 2);
        System.out.println ( "3^2 = " + p);

        p = power (3, 4);
        System.out.println ( "3^4 = " + p);

        p = power (2, 8);
        System.out.println ( "2^8 = " + p);
    }

    static int power (int a, int b)
    {
        int p;
        
        if (b == 0) {
            p = 1;
        }
        else {
            // Note use of recursion:
            p = a * power (a, b-1);
        }

        return p;
    }

}