JavaScript (Datatype and variable)

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String A text of characters enclosed in quotes

Number A number representing a mathematical value

Bigint A number representing a large integer

Boolean A data type representing true or false

Object A collection of key-value pairs of data

Undefined A primitive variable with no assigned value

Null A primitive value representing object absence

Symbol A unique and primitive identifier

Variables = Data Containers

JavaScript variables are containers for data.

JavaScript variables can be declared in 4 ways:
Modern JavaScript

Using let
Using const

Older JavaScript

Using var (Not Recommended)
Automatically

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