第7周作業1-循環大戰(WHILE語句）

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;  
        while(i<=n)  
        {  
            num=num*i;  
            i++;  
        }System.out.print(num);  
    }  

}