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 java0806;

import java.util.Scanner;

public class text_nn {
    public static void main(String[] args) {

        Scanner scan = new Scanner(System.in);
        for (int j= 0;; j++) {
            System.out.println("输入想要计算的阶乘：");
            int n= scan.nextInt();
            if(n==1){
                System.out.println(1);
            }
            int sum=1;
        for (int i = 1; i <=n; i++) {
            sum*=i;
        }
        System.out.println(sum);

    }     }
}