You've written code that runs from top to bottom. You've used loops to repeat things. But what if you need the same code in multiple places? Copy-pasting creates a mess. Change one copy, forget another, and bugs appear.
Functions solve this. In this section, I'll show you how to wrap code into reusable pieces called functions. You'll learn to define them, call them, pass data in, and get results back. By the end, you'll organize code like a professional.