Functions in Python

Learning Outcome:

By the end of the Chapter, students will be able to:

• Understand the concept of functions in Python.
• Learn the benefits of using functions.
• Identify different types of functions in Python.
• Creating and Calling Functions in Python
• Effectively use functions in Python programming.
• Python Modules

Material Required:

• Computer/Laptop with Python installed (IDLE, Jupyter Notebook, or VS Code)
• Projector/Smartboard for demonstrations
• Lesson slides/PPT on Python functions
• Handouts or printed notes on function concepts
• Sample Python code examples
• Whiteboard and markers (for explanations)
• Internet access (for referencing documentation or running online Python interpreters)

LESSON PLAN 

(PERIOD -WISE DISTRIBUTION OF COURSE)

Period Allotted (2 Theory + 2 Practical)

Theory 1:

​Introduction (30 Minutes): Introduction to Python Functions

• Explain what a function is in Python.
• Discuss why functions are used in programming.
• Provide simple real-life examples (e.g., making tea, ordering food).

​Benefits of Using Functions

• Code reusability
• Improved readability and organization
• Easier debugging and maintenance
• Efficient execution

​Python Function Declaration

• • Syntax of function declaration:

python
CopyEdit
def function_name(parameters):  
    # Function body  
    return value

Theory -2 (30 minutes): 

   1. ​​Types of Functions in Python

• • • Built-in Functions (e.g., print(), len(), sum(), max(), min())
• • • User-Defined Functions (functions created by the user)

   2. ​Creating and Calling Functions in Python

• • • Arguments and Parameters
    • • Number of Arguments
      • Arbitrary Arguments (*args)

​3. ​Python Lambda Functions: Explain lambda functions as anonymous functions.

​4. ​Python Modules

Teacher’s Tip:

• Creating a Python Module
• Use live coding demonstrations.
• Encourage students to try hands-on coding.
• Ask concept-checking questions to assess understanding.
• Provide real-world examples to illustrate concepts.

LAB ACTIVITIES:

Activity 1:

Objective: ​Apply Python functions to solve a problem using user-defined functions and modules.

​Steps:

1. Write a Python program that defines a function to calculate the area and perimeter of a rectangle.
2. Create a separate module (geometry.py) that contains the function.
3. Import the module into another script and use the function to calculate values for different inputs.
4. Display the results in a user-friendly format.
5. Test the program with multiple inputs and validate the results.

​Expected Outcome:

​Students will learn how to create, import, and use functions effectively in Python programming.

Activity 2:

​Objective: Apply Python functions to solve a problem using user-defined functions and modules.

​Steps:

1. Write a Python program that defines a function to calculate the area and perimeter of a rectangle.
2. Create a separate module (geometry.py) that contains the function.
3. Import the module into another script and use the function to calculate values for different inputs.
4. Display the results in a user-friendly format.
5. Test the program with multiple inputs and validate the results.

​Expected Outcome:

​Students will learn how to create, import, and use functions effectively in Python programming.