计算n的阶乘

n的阶乘是 n*(n-1)*(n-2)*……*1

比如5的阶乘是5*4*3*2*1

要求输入数字n，计算n的阶乘

package day03;

import java.util.Scanner;

public class test6_jiecheng {
    public static void main(String[] args) {
        Scanner scan =new Scanner(System.in);
        int n= scan.nextInt();
        int num=1;
        for (int i = n; i >1 ; i--) {
            num*=i;
        }
        System.out.println(num);
    }
}