Method rand7

java/Chapter 17/Question17_11/Question.java:4–11

()

public class Question {
	public static int rand7() {
		while (true) {
			int num = 5 * rand5() + rand5();
			if (num < 21) {
				return num % 7;
			}
		}
	}

	public static int rand5() {
		return (int) (Math.random() * 100) % 5;