Functions

Function Declarations

Function Expressions

Anonymous Functions

Arrow Functions

Function Invocation

Arguments Object

Default Parameters

Rest Parameters

Spread Syntax in Function Calls

Returning Values

Returning Objects

Global Scope

Function Scope

Block Scope

Lexical Scope

Definition and Mechanics

Use Cases

Common Patterns

IIFE Syntax

Purpose and Benefits

Functions as Arguments

Functions as Return Values

map Method

filter Method

reduce Method