算法学习--递归求n的阶乘

//导入相关包
import javax.swing.*;
import java.util.Scanner;
public class exercise {
    public static void main(String args[]) {
        //键盘输入
        Scanner input = new Scanner(System.in);
        int number = input.nextInt();
        System.out.print("请输入您要求得阶乘：");
        //调用方法并打印
        int i = factorial(number);
        System.out.println(i);
    }
      //先判断n的范围，之后再进行递归
    public static int factorial(int n){
        if (n == 1 || n == 0)
            return 1;
        return n*factorial(n-1);
        }
    }