JS基础，课堂作业，成绩练习

成绩练习
 1 <script>
 2     var name = prompt("请输入学生姓名：");
 3     var degree = parseInt(prompt("请输入学生成绩："));
 4     
 5     if(degree == 100) {
 6         
 7         alert("恭喜你：" + name + "，" + "满分通过" + "。");
 8         
 9         
10         
11         
12     } else if(degree >= 80 && degree < 100) {
13         
14         alert(name + "，" + "你很优秀，继续保持！");
15         
16         
17         
18         
19     } else if(degree >= 60 && degree < 80) {
20         
21         alert(name + "成绩良好！");
22         
23         
24         
25         
26     } else if(degree >= 50 && degree < 60) {
27         
28         alert(name + "就差一点点，下次一定要至少及格！");
29         
30         
31         
32         
33     } else {
34         
35         alert(name + "你是笨蛋么？");
36     }
37 </script>