java 阶乘实现

import java.text.SimpleDateFormat;
import java.util.Date;


public class ImoocStudent {

    public static void main(String[] args) throws Exception{
        for(int counter = 0; counter <= 10;counter++){
            // 这里写法:把counter，factorial() 对应放到第一个%d , 第二个%d
            System.out.printf("%d! = %d\n",counter,factorial(counter));
        }
    }


    public static long factorial(long number){
        if(number <= 1)
            return 1;
        else
            return number * factorial(number - 1);
    }


}