第七周1 while循环判断

import java.util.Scanner;  public class FactorialTest{       public static void main(String args[]){                  int n;          Scanner y=new Scanner(System.in);      n=y.nextInt(  );          int num=1;          int i=1;          while(i<=n)          {              num=num*i;              i++;          }System.out.print(num);      }