factorial-che

public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        int number;
        do {
            number = input.nextInt();
            if (number == 0) {
                continue;
            }

            int sum = 1;
            int count = 1;
            while (count <= number) {
                sum *= count;
                count++;
            }

            System.out.println(sum);
        } while (number != 0);
    }