import org.pureprogrammer.Utils;

public class Functions5 {

	static long factorial(int x) {
		if (x <= 1) {
			return 1;
		}
		return x * factorial(x - 1);
	}

	public static void main(String[] args) {
		for (int x = 1; x < 10; ++x) {
			System.out.println(Utils.format("{0:d}! = {1:d}", x, factorial(x)));
		}
	}
}