Summary  
This chapter covers how to define named functions with parameters and return values and how to call them to encapsulate and reuse logic.  

General domain of usage  
Data processing

A beginner-friendly course introducing the fundamentals of Python programming, including variables, data types, control flow, functions, and basic data structures. Each section builds foundational skills with clear explanations, code examples, and hands-on practice.

Learn the basics of Python syntax, variables, and simple input/output operations.

Master the use of conditional statements and loops to control the flow of your programs.

Learn how to write reusable code using functions and understand the basics of modular programming.

Get hands-on with Python's built-in data structures: lists, tuples, and dictionaries.

Discover how to use Python's standard modules and import functionality.

Defining and Calling Functions