求n的阶乘

package yxq;
import java.util.Scanner;
public class n的阶乘 {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int n;
System.out.println( "输入一个整数");
n=in.nextInt();
int i=1,sum=1;
for(i=1;i<=n;i++)
{
sum=sum*i;
}
System.out.print(sum);
}

}