Assert statement usage in Python - Mini Project: Build & Apply

Assert Statement Usage

📖 Scenario: You are working on a simple program that checks if a user's age is valid for a certain activity. You want to make sure the age is not negative and is within a reasonable range.

🎯 Goal: Build a program that uses assert statements to check the validity of an age value.

📋 What You'll Learn

Create a variable called age with a specific integer value.

Create a variable called max_age to set the maximum allowed age.

Use assert statements to check that age is not negative and does not exceed max_age.

Print a message confirming the age is valid.

💡 Why This Matters

🌍 Real World

Assert statements help programmers catch mistakes early by checking if values are correct while the program runs.

💼 Career

Many software jobs require writing code that safely checks data and assumptions to avoid bugs and errors.

1

Create the age variable

Create a variable called age and set it to the integer value 25.

Python

# Create a variable called age and set it to 25
# Your code here

Need a hint?

Use a simple assignment like age = 25.

2

Create the max_age variable

Create a variable called max_age and set it to the integer value 120.

Python

age = 25
# Create a variable called max_age and set it to 120
# Your code here

Need a hint?

Use a simple assignment like max_age = 120.

3

Add assert statements to check age

Add two assert statements: one to check that age is greater than or equal to 0, and another to check that age is less than or equal to max_age.

Python

age = 25
max_age = 120
# Add assert statements to check age is >= 0 and <= max_age
# Your code here

Need a hint?

Use assert age >= 0 and assert age <= max_age.

4

Print confirmation message

Write a print statement that outputs the exact text: "Age is valid."

Python

age = 25
max_age = 120
assert age >= 0
assert age <= max_age
# Print "Age is valid." below
# Your code here

Need a hint?

Use print("Age is valid.") to show the message.