Functions and Modularity

Function Syntax

Function Naming Conventions

Function Bodies

Return Values and Exit Status

Basic Function Calls

Passing Arguments

Function Return Values

Global Variables

Local Variables (local keyword)

Scope Rules

Variable Shadowing

Modifying Global Variables

Recursive Functions

Function Libraries

Function Overriding

Anonymous Functions

source Command

Dot (.) Command

Loading Configuration Files

Creating Function Libraries

Effects on Current Shell Environment

Search Path for Sourced Files