package lectures.main_consoleinput;
import util.annotations.WebDocuments;

@WebDocuments({"Lectures/MainConsoleinput.pptx", "Lectures/MainConsoleinput.pdf", "Videos/MainConsoleinput.avi"})
public class AFactorialList {

    public static void main (String[] args) {
        int n = Console.readInt();
        while (n >= 0) {
            System.out.println("factorial = " + factorial(n));
            n = Console.readInt();
        }
     }

    public static int factorial (int n) {
         int product = 1;
         while (n > 0) {
             product *= n;
             n -= 1;
        }
         return product;
     }
    
}