Function call and execution flow in Python - Mini Project: Build & Apply

Function call and execution flow

📖 Scenario: Imagine you are creating a simple program to greet users by name and show a welcome message. This program will use functions to organize the greeting steps.

🎯 Goal: You will build a program with functions that greet a user by name and then display a welcome message. You will see how functions are called and how the program flows from one function to another.

📋 What You'll Learn

Create a function to greet a user by name

Create a function to display a welcome message

Call the greeting function with a specific name

Observe the order of function calls and outputs

💡 Why This Matters

🌍 Real World

Functions help organize code into reusable blocks, making programs easier to read and maintain.

💼 Career

Understanding function calls and execution flow is essential for writing clear and efficient code in any programming job.

1

Create a function called greet_user that takes one parameter name and prints "Hello, {name}!"

Write a function named greet_user that accepts a parameter called name. Inside the function, use print(f"Hello, {name}!") to greet the user by name.

Python

# Define the function greet_user with parameter name
# Your code here

Need a hint?

Use def to define the function and print with an f-string to include the name.

2

Create a function called welcome_message that prints "Welcome to our program!"

Write a function named welcome_message that takes no parameters and prints "Welcome to our program!" when called.

Python

def greet_user(name):
    print(f"Hello, {name}!")

# Define the function welcome_message
# Your code here

Need a hint?

Define a function with no parameters and use print inside it.

3

Call the function greet_user with the argument "Alice" and then call welcome_message

Write two lines of code: first call the function greet_user with the argument "Alice", then call the function welcome_message with no arguments.

Python

def greet_user(name):
    print(f"Hello, {name}!")

def welcome_message():
    print("Welcome to our program!")

# Call greet_user with "Alice" and then call welcome_message
# Your code here

Need a hint?

Call each function by its name followed by parentheses. Pass "Alice" as argument to greet_user.

4

Print the output of the program to see the greeting and welcome message

Run the program so it prints the greeting for "Alice" and the welcome message. The output should show both messages in order.

Python

def greet_user(name):
    print(f"Hello, {name}!")

def welcome_message():
    print("Welcome to our program!")

greet_user("Alice")
welcome_message()

# Run the program to see the output
# Your code here

Need a hint?

Just run the program. The two print statements inside the functions will show the messages.