Factorials.java

import java.util.Scanner;

// ****************************************************************
// Factorials.java
//
// Reads integers from the user and prints the factorial of each.
//
// ****************************************************************
public class Factorials {

	public static void main(String[] args) {
		String keepGoing = "y";
		Scanner scan = new Scanner(System.in);

		while (keepGoing.equals("y") || keepGoing.equals("Y")) {
			System.out.print("Enter an integer: ");
			int val = scan.nextInt();
			try {
				System.out.println("Factorial(" + val + ") = "
								+ MathUtils.factorial(val));
			}
			catch (IllegalArgumentException problem) {
				System.out.println(problem.getMessage());
			}	
			System.out.print("Another factorial? (y/n) ");
			keepGoing = scan.next();
		}
	}
	
}