JavaScript入门之多分支结构

来源:互联网 发布:js改变button的值 编辑:程序博客网 时间:2024/05/21 19:41
<html><head><title>多分支结构</title><script type = "text/javascript">var grade = prompt("请输入成绩",60);if (grade >= 90 && grade <= 100){alert("优秀");}else if (grade >= 80 && grade < 90){alert("zhong");}else if (grade >= 70 && grade < 80){alert("jige");}else{alert("bujige");}</script></head><body></body></html>



<html><head><title>多分支结构</title><script type = "text/javascript">var dj = prompt("请输入张三的等级","d");var sal = 1000;switch(dj){case "a": sal += 200; break;case "b": sal += 300; break;case "c": sal += 400; break;default: sal = sal;}alert(sal);</script></head><body></body></html>


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