N的阶乘

package n;

import java.util.Scanner;

public class jiechen {

 public static void main(String[] args)  

{      Scanner sc=new Scanner(System.in);       

  System.out.println("输入阶乘：");     

int n=sc.nextInt();  

System.out.println("结果为:"+f(n));

 }  

public static int f(int n)  {  

int sum=1;  

 for(int i=1;i<=n;i++)   

{    sum=sum*i;   

}   

return sum;  

} 

}