【代码笔记】Web-JavaScript-JavaScript语法

一，效果图。

二，代码。

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>javascript 语法</title>
</head>

<body>
    <!--JavaScript 字面量-->
    <p id="demo"></p>
    <script>
    document.getElementById("demo").innerHTML = 123e5;
    document.getElementById("demo").innerHTML = "John doe";
    document.getElementById("demo").innerHTML = 5 * 10;
    var length;
    length = 6;
    document.getElementById("demo").innerHTML = length;
    document.getElementById("demo").innerHTML = (5 + 6) * 10;
    </script>
</body>

</html>