The `typeof` operator is a powerful tool used to determine the data type of a variable.

For instance:

*   `typeof "John"` will return "string".
*   `typeof 3.14` will return "number".
*   `typeof NaN` will also return "number".
*   `typeof false` will return "boolean".
*   `typeof [1,2,3,4]` will return "object".
*   `typeof {name:'John', age:34}` will return "object".
*   `typeof new Date()` will return "object".
*   `typeof function () {}` will return "function".
*   `typeof myCar` will return "undefined".
*   `typeof null` will return "object".

JavaScript's data types can be divided into two main categories based on the values they hold:

**Data types that can contain values:**

*   `string`
*   `number`
*   `boolean`
*   `object`
*   `function`

JavaScript provides several object types including `Object`, `Date`, `Array`, `String`, `Number`, and `Boolean`.

**Data types that cannot contain values:**

*   `null`
*   `undefined`

A primitive data value is a straightforward value with no extra properties or methods and is not an object. They are unchangeable, meaning they can't be modified. There are seven primitive data types:

*   `string`
*   `number`
*   `bigint`
*   `boolean`
*   `undefined`
*   `symbol`
*   `null`


Chapter 1 : Basics

Type of

The `typeof` operator is a powerful tool used to determine the data type of a variable.

For...

WebJAM

WebJAM

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