学步园

/**
	 * @author PLA 阶乘
	 */

	public static void main(String[] args) {
		System.out.println("请输入一个数字：");
		Scanner scanner = new Scanner(System.in);
		int i = scanner.nextInt();
		System.out.println(i + "!=" + fac(i));
	}

	private static int fac(int i) { // TODO Auto-generated method stub
		if (i == 1)
			return 1;
		else
			return i * fac(i - 1);
	}