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## primitive-reference-types-javascript.md

      
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                Primitive Types & Reference Types in JavaScript
              
          
    Primitive Types & Reference Types in JavaScript

An explanation of JavaScript's pass-by-value, which is unlike pass-by-reference from other languages.
Facts


JavaScript has 2 kinds of variable types: primitive and reference.
A fixed amount of memory is reserved after creation of every variable.
When a variable is copied, it's in-memory value is copied.
Passing a variable to a function via a call also creates a copy of that variable.

Primitive Types