#!/usr/bin/env swift;
import Foundation
import Utils

func factorial(_ x:Int) -> Int64 {
	if x <= 1 {
		return 1
	}
	return x * factorial(x - 1)
}

// Begin Main
for x:Int in 1..<10 {
	print(Utils.format("{0:d}! = {1:d}", x, factorial(x)))
}

exit(EXIT_SUCCESS)