请问下老师是否是正确的

来源：3-11 编程练习

慕侠635704

2019-12-06 01:09:00

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>数据类型之NaN</title>
</head>
<body>
    <script>
//补充代码
var special=null,age=10,text="我是字符串",id="10",address;
console.log(isNaN(null));
console.log(isNaN(age));
console.log(isNaN(text));
console.log(isNaN(id));
console.log(isNaN(address));
</script>
</body>
</html>

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