For loop execution model in Python - Mini Project: Build & Apply

Understanding For Loop Execution Model

📖 Scenario: Imagine you are organizing a small party and you have a list of guests. You want to greet each guest by name.

🎯 Goal: You will create a list of guest names, set up a greeting message, use a for loop to greet each guest, and finally print all greetings.

📋 What You'll Learn

Create a list called guests with the exact names: 'Alice', 'Bob', 'Charlie'

Create a variable called greeting with the exact value 'Hello'

Use a for loop with the variable guest to iterate over guests

Before the loop, create a list called messages that stores each greeting message combining greeting and guest

Print each greeting message stored in messages after the loop

💡 Why This Matters

🌍 Real World

Greeting guests or customers by name is common in apps, websites, and events to make people feel welcome.

💼 Career

Understanding how to use for loops to process lists is a fundamental skill for many programming jobs, including web development, data processing, and automation.

1

Create the guest list

Create a list called guests with these exact names: 'Alice', 'Bob', 'Charlie'

Python

# Create the list guests with 'Alice', 'Bob', and 'Charlie'
guests = []  # Your code here

Need a hint?

Use square brackets [] to create a list and separate names with commas.

2

Set up the greeting message

Create a variable called greeting and set it to the string 'Hello'

Python

guests = ['Alice', 'Bob', 'Charlie']
# Create a variable greeting with the value 'Hello'
greeting = ''  # Your code here

Need a hint?

Use quotes to create a string. For example: greeting = 'Hello'

3

Use a for loop to create greeting messages

Before the loop, create a list called messages. Use a for loop with the variable guest to iterate over guests. Inside the loop, append each greeting message combining greeting and guest separated by a space to messages.

Python

guests = ['Alice', 'Bob', 'Charlie']
greeting = 'Hello'
# Create an empty list messages before the loop
messages = []
# Use a for loop to add greeting messages to messages
for guest in guests:
    # Your code here

Need a hint?

Use messages.append(f"{greeting} {guest}") inside the loop to add each message.

4

Print all greeting messages

Write a for loop with the variable message to iterate over messages and print each message.

Python

guests = ['Alice', 'Bob', 'Charlie']
greeting = 'Hello'
messages = []
for guest in guests:
    messages.append(f"{greeting} {guest}")

# Print each message in messages
for message in messages:
    # Your code here

Need a hint?

Use print(message) inside the loop to show each greeting.