JavaScript-Notes/02_Datatypes.txt at main · hitarthpathak/JavaScript-Notes · GitHub

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Datatypes are divided in 2 categories based on how they are Stored and Accessed from Memeory.


PRIMITIVE DATATYPES :-
1. String
2. Number
3. Boolean
4. Null
5. Undefined
6. Symbol
7. BigInt


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NON-PRIMITIVE DATATYPES :-
1. Object


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Built-In Object Types / Data Structure Object Types :-
1. Array
2. Function
3. Date
4. RegExp (Regular Expression)
5. Map
6. Set
7. Error
8. Math
9. JSON (JavaScript Object Notation)
10. Promise


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NOTE :-
1. In JavaScript, everything is an Object except for Primitive Datatypes.
2. Primitive Datatypes are Im-Mutable (cannot be changed).
3. Non-primitive Datatypes are Mutable (can be changed).
4. null is a Primitive Datatype, but typeof null returns "object". It is a historical bug that can't be fixed now.
5. Primitive Datatype are stored by Values, while Non-Primitive Datatype are stored by References.