4.24上机作业

2.编写一个方法，求整数n的阶乘，例如5的阶乘是1*2*3*4*5

package java001;

import java.util.Scanner;

public class java001 {
    
    public static int Factorial(int x) {
        int sum = 1;
        for (int i = 1; i <= x; i++) {
            sum *= i;
        }
        return sum;
    }
    
    public static void main(String[] args) {
        System.out.println("请输入一个数字：");
        Scanner input = new Scanner(System.in);
        int i = input.nextInt();
        System.out.println(i + "的阶乘是：" + Factorial(i));
        
    }
}

　　编写一个方法，判断该年份是平年还是闰年

package java001;

import java.util.Scanner;

public class java001 {

    public static void Text(int year) {
        if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
            System.out.println(year + "是闰年");
        } else {
            System.out.println(year + "不是闰年");
        }
    }

    public static void main(String[] args) {
        System.out.println("请输入年份：");
        Scanner input = new Scanner(System.in);
        int n = input.nextInt();
        Text(n);

    }
}