[Java]递归算法求n的阶乘（n>1，n是正整数）

import java.util.Scanner;
public class Factorial{
 public static int factorial(int n){
  if(n==1){
   return 1;
  }
  else{
   return n*factorial(n-1);
  }
 }
 public static void main(String[] args){
  System.out.println("请输入要求n的阶乘，n的值：");
  Scanner s=new Scanner(System.in);
  int n=s.nextInt();
  System.out.println(factorial(n));  
 } 
}