Summary  
This chapter covers the JavaScript primitive null data type, which represents an explicit absence of value and must be assigned to a variable. It distinguishes null’s intentional non-value from undefined’s default unassigned state.

General domain of usage  
Variable initialization

### What is Null

The data type `null` represents that there is no value. It is a primitive value in javascript.

To have a better understanding of `null`, we must know these two features about `null`:

-   `null` provides the non-existent value or empty value.
-   `null` has to be assigned to a variable as it is not assigned by default (unlike the `undefined`).

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The syntax of the JavaScript programming language is the set of rules that defines how a JavaScript program will be written and interpreted (by both the runtime system and by human readers).

JavaScript is dynamically typed (also called loosely typed) scripting language. That is, in javascript variables can receive different data types over time. Datatypes are basically typed of data that can be used and manipulated in a program.

Null

What is Null

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