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

Pass Statement Usage

📖 Scenario: Imagine you are writing a program that checks different types of animals. Sometimes, you want to leave a part of the program empty for now and come back to it later.

🎯 Goal: You will create a program that uses the pass statement to leave empty blocks in your code. This helps keep your program running without errors while you plan to add more code later.

📋 What You'll Learn

Create a function called check_animal that takes one parameter called animal.

Inside the function, use an if statement to check if animal is 'dog'.

Use the pass statement inside the if block to leave it empty.

Add an else block that prints 'Unknown animal'.

Call the function check_animal with the argument 'dog' and then with 'cat'.

💡 Why This Matters

🌍 Real World

Using <code>pass</code> helps programmers plan their code step-by-step without stopping the program from running.

💼 Career

Knowing how to use <code>pass</code> is useful when writing code that is still being developed or when creating placeholder functions.

1

Create the function check_animal

Write a function called check_animal that takes one parameter named animal.

Python

# Define the function check_animal with parameter animal
# Your code here

Need a hint?

Use the def keyword to create a function named check_animal with one parameter animal.

2

Add an if statement with pass

Inside the function check_animal, write an if statement that checks if animal is equal to the string 'dog'. Inside this if block, write the pass statement.

Python

def check_animal(animal):
    # Add if statement to check if animal is 'dog'
    # Use pass inside the if block
    # Your code here

Need a hint?

Use if animal == 'dog': and then write pass inside the block to leave it empty.

3

Add an else block that prints a message

Add an else block after the if statement inside the function check_animal. In the else block, write a print statement that outputs the text 'Unknown animal'.

Python

def check_animal(animal):
    if animal == 'dog':
        pass
    # Add else block to print 'Unknown animal'
    # Your code here

Need a hint?

Use else: and then print('Unknown animal') inside the else block.

4

Call the function twice and print output

Call the function check_animal with the argument 'dog' and then call it again with the argument 'cat'.

Python

def check_animal(animal):
    if animal == 'dog':
        pass
    else:
        print('Unknown animal')

# Call check_animal with 'dog' and 'cat'
# Your code here

Need a hint?

Call check_animal('dog') and check_animal('cat'). Only the second call prints 'Unknown animal'.