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Module 3Beginner-Intermediate
Functions & Modularity
Write reusable, organized code with functions. Learn parameters, returns, and scope.
3-4 hours
5 Lessons
8 Exercises
🎯 Learning Objectives
By completing this module, you will:
- Define and call functions
- Use parameters and return values
- Understand variable scope
- Create functions with default parameters
- Use lambda functions
- Master built-in Python functions
- Write clean, modular code
📖 Lessons
Lesson 1: Introduction to Functions
30 min- •What are functions?
- •Defining functions
- •Calling functions
- •Naming conventions
Lesson 2: Parameters and Arguments
35 min- •Positional parameters
- •Keyword arguments
- •Default parameters
- •*args and **kwargs
Lesson 3: Return Values
30 min- •The return statement
- •Returning multiple values
- •Functions without return
- •Using returned values
Lesson 4: Variable Scope
30 min- •Local vs global scope
- •The global keyword
- •Scope best practices
- •Common scope errors
Lesson 5: Advanced Functions
35 min- •Lambda functions
- •map, filter, reduce
- •Function documentation
- •Best practices
📚 Module Resources
🚀 End-of-Module Project
Temperature Converter Library
Build a comprehensive temperature conversion system with validation and formatting.
Features you'll build:
- ✓Multiple conversions
- ✓Input validation
- ✓Interactive menu
- ✓Professional formatting