/** Compute the factorial of a number taken from the command line
 * 
 * @author ggtowell
 * Created: Oct 2023
 */
public class Factorial {
    public static void main(String[] args) {
        int numFromUser = 0;
        try {
            numFromUser = Integer.parseInt(args[0]);
            int factResult = doFactorial(numFromUser);
            System.out.println("The factorial of " + numFromUser + " is " + factResult);
            System.out.println("The factorial of " + numFromUser + " is " + doFactorial(numFromUser));
        } catch (Exception error) {
            System.out.println(error);
            return;
        }
    }

    public static int doFactorial(int highest) {
        int rtn = 1;
        for (int i = highest; i >= 1; i--) {
            rtn *= i;
        }
        return rtn;
    }
}