<p>1) Javascript has 5 primitive types data types. Boolean, null, undefined, String, and Number. [ That are passed by value]</p>
<p>2) Javascript has 3 data types that are passed by reference: Array, Function, and Object. These are all technically Objects, so we’ll refer to them collectively as Objects.</p>
<h1 id="heading-javascript-engines-have-two-places-where-they-can-store-data-the-memory-heap-and-stack">JavaScript engines have two places where they can store data: The memory heap and stack.</h1>
<p> <a target="_blank" href="https://felixgerschau.com/javascript-memory-management/">Source</a>  </p>
<p>Heaps and stacks are two data structures that the engine uses for different purposes.</p>
<h2 id="heading-stack">Stack</h2>
<p>Primitive values and references ,Size is known at compile time,Allocates a fixed amount of memory                                                          </p>
<h2 id="heading-heap">Heap</h2>
<p>Objects and functions Size is Known at run Time . No limit per object .</p>


1) Javascript has 5 primitive types data types. Boolean, null, undefined, String, and Number. [ That are passed by value]

2) Javascript has 3 data types that are passed by reference: Array, Function, and Object. These are all technically Objects, so we’ll refer to them collectively as Objects.



# JavaScript engines have two places where they can store data: The memory heap and stack.

 [Source](https://felixgerschau.com/javascript-memory-management/)  


Heaps and stacks are two data structures that the engine uses for different purposes.

## Stack	                                                                      
Primitive values and references ,Size is known at compile time,Allocates a fixed amount of memory	                                                      

## Heap 
Objects and functions Size is Known at run Time . No limit per object .





JSDev

JSDev

JS Memory allocation

JavaScript engines have two places where they can store data: The memory heap and stack.

Stack

Heap