第7周作业1-循环大战（DO-WHILE语句）

import java.util.Scanner;public class FactorialTest{public static void main(String args[]){int n=3;Scanner y=new Scanner(System.in);n=y.nextInt(  );int num=1;int i=1;do{num=num*i;i++;}while (i<=n);System.out.print(num);}}