代码示例:(标识:eg_js_variables_create)
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 变量</h1>

<p>创建一个变量,向其赋值,然后显示它:</p>

<p id="demo"></p>

<script>
var carName = "porsche";
document.getElementById("demo").innerHTML = carName;
</script>

</body>
</html>
运行结果: