# Module 03: Functions

## Learning Goals

- Declare and define functions with clear interfaces
- Pass arguments by value, reference, and `const` reference
- Overload functions and use default parameters
- Implement recursive algorithms safely

## Exercises

| Exercise | Topic |
|----------|-------|
| `function_basics` | Value/reference parameters, return values |
| `overloading` | Function overloading |
| `default_parameters` | Default arguments |
| `recursion` | Recursive algorithms |