JAVA 判断此考试成绩为什么等级。90-100之间为优秀80-89之间为优良70-79之间为良好，60-69之间为及格60分以下为不及格。

package cn.bpqn.demo04;

import java.util.Scanner;

public class Lianxi2 {

	public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
       System.out.println("请输入你的成绩：");
       double score = sc.nextDouble();
       if(score>=90&&score<=100){
    	   System.out.println("成绩优秀");
       }else if(score>=80&&score<=89){
    	   System.out.println("成绩优良");
       }else if(score>=70&&score<=79){
    	   System.out.println("成绩良好");
       }else if(score>=60&&score<=69){
    	   System.out.println("成绩及格");
       }else{
    	   System.out.println("成绩不及格");
       }
	}

}