求n的阶乘（for循环版）

package hello;import java.util.Scanner;public class Hello {    public static void main(String[] args) {        Scanner in = new Scanner(System.in);        int n;        n=in.nextInt();        int i=1,sum=1;        for(i=1;i<=n;i++)        {            sum=sum*i;        }        System.out.print(sum);    }}