N 的阶乘

package test;

import java.uti1.Scanner;

public class test1{

  public static void main（String[] args）{

  int n;

Scanner s=new Scanner(System.in);

 n=s.nextInt();

int sum=1;

for(int i=1;i<=n;i++){

sum=sum*i;

}System.out.println(sum);

}

}