// PowersOfTwo.java
// CS 101 class example
// prints powers of two
// demonstrates for loop

public class PowersOfTwo {

    public static void main(String[] args) {
        int p = 1;
        for (int i = 0; i <= 20; i++) {
            System.out.println("i = " + i + " 2^i = " + p);
            p = p * 2;
        }
    }

}