if-else循环struct

import java.util.Scanner;

public class Demo01 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        System.out.println("请输入成绩：");
        int score = scanner.nextInt();

        //equals:判断字符串是否相等
        /*
        String s = scanner.nextLine();
        if(s.equals("hello")){}
         */

        if (score==100){
            System.out.println("满分");
        }else if (score<100 && score>80){
            System.out.println("A");
        }else if (score<80 && score>60){
            System.out.println("B");
        }else if (score<60 && score>=0){
            System.out.println("不及格");
        }else{
            System.out.println("成绩不合法");
        }
        scanner.close();
    }
}