/**

* Examples from Chapter 7.

*/

public class Loops {

public static void countdown(int n) {

while (n > 0) {

System.out.println(n);

n = n - 1;

}

System.out.println("Blastoff!");

}

public static void sequence(int n) {

while (n != 1) {

System.out.println(n);

if (n % 2 == 0) { // n is even

n = n / 2;

} else { // n is odd

n = n * 3 + 1;

}

}

}

public static void main(String[] args) {

System.out.println("countdown");

countdown(3);

System.out.println("sequence");

sequence(10);

}

}