23ji基础，变量

<head>
    <meta charset="UTF-8">
    <title>变量和数据类型</title>
</head>
<body>
        <script>
            /*变量的声明*/
            var num;
            var n1=100;
            let num2 = "123ff";
            let n2 = 89.4;
            document.writeln("num;"+num+"<br>");
            document.writeln("n1;"+n1+"<br>");
            document.writeln("num2;"+num2+"<br>");
            document.writeln("n2;"+n2+"<br>");

        </script>

</body>

posted on 2022-04-10 11:25 小小程序猿level1 阅读(26) 评论(0) 收藏举报