技術標籤：java基礎

Java遞迴實現階乘

package com.ycy1;

public class Test05 {
	public static void main(String[] args) {
		int i = 5;
		int fac = Test05.fac(i);
		System.out.println(i + " 的階乘是：" + fac);
	}

	public static int fac(int i) {
		int result = 0;
		if (i >= 0) {
			if (i == 0 || i == 1) {
				result =
 
 1;
			} else {
				result = i * fac(i - 1);
			}

		} else {
			System.out.println("資料有誤！");
			result = -1;
		}
		return result;
	}

}