JavaScript的数据类型判断学习理解和数据处理 

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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
let Date1, Date2,Date3 ,Date4 ,Date5;
Date1 =123;
Date2 ="string"
Date3 =false
Date4 =document 
    document.write("Date1 是"+typeof(Date1)+"型"+"<br>");
    document.write("Date2 是"+typeof(Date2)+"型"+"<br>");
    document.write("Date3 是"+typeof(Date3)+"型"+"<br>");
    document.write("Date4 是"+typeof(Date4)+"型"+"<br>");
    document.write("Date5 是"+typeof(Date5)+"型"+"<br>");
   
   
    let basePay="8000",subsidy="2356",pergormance="2589";
    sum=parseFloat(basePay)+parseFloat(subsidy)+parseFloat(pergormance);
    document.write("底薪是"+basePay+"<br>");
    document.write("补贴"+subsidy+"<br>");
    document.write("绩效"+pergormance+"<br>");
    document.write("总工资是"+sum)+"<br>";
   </script>
    
</body>
</html>
posted @ 2020-07-15 20:31  zayyo  阅读(126)  评论(0)    收藏  举报