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- <!DOCTYPE html>
- <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>
- var a1;
- console.log(typeof A1); //=> undefined
- var www = [];
- console.log(typeof www); //=> Object
- var b1 = 'kdjfks123hf';
- console.log(typeof b1); //=> String
- var b3 = true;
- console.log(typeof b3); //=> Boolean
- var b4 = null;
- console.log(typeof b4); // => Object
- var b5 = {};
- console.log(typeof b5); // => Object
- </script>
- </body>
- </html>
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