Functions

Python comes with dozens of ready-made functions you can use immediately without writing any extra code. Knowing the most common ones saves time and makes your programs more readable.

Functions let you group a block of code under a name so you can reuse it anywhere in your program. They are the key to writing clean, organised, and maintainable code.

Parameters let functions accept input values, making them reusable for different situations. Understanding the difference between parameters and arguments is key to writing flexible code.

A return value is the result a function sends back to the code that called it. Return values let functions produce data that can be stored, printed, or used in further calculations.