Boolean values (True and False) in Python - Mini Project: Build & Apply

Working with Boolean values (True and False)

📖 Scenario: Imagine you are creating a simple system to check if a store is open or closed based on a schedule.

🎯 Goal: You will create a program that uses Boolean values to represent if the store is open or closed, then print the store status.

📋 What You'll Learn

Create a Boolean variable to represent if the store is open

Create a Boolean variable to represent if the store is closed

Use the Boolean variables to check the store status

Print the store status using the Boolean values

💡 Why This Matters

🌍 Real World

Boolean values are used everywhere to represent yes/no, on/off, or true/false conditions in programs.

💼 Career

Understanding Boolean logic is essential for making decisions in software, such as checking if a user is logged in or if a feature is enabled.

1

Create Boolean variables for store status

Create a Boolean variable called store_open and set it to True. Create another Boolean variable called store_closed and set it to False.

Python

# Create Boolean variables for store status
# Your code here

Hint

Boolean values are either True or False. Use these to set the variables.

2

Create a variable to hold the store status message

Create a variable called status_message and set it to the string 'Store is open' if store_open is True, otherwise set it to 'Store is closed'.

Python

store_open = True
store_closed = False
# Create a variable called status_message with the correct message
# Your code here

Hint

Use a simple if-else expression to set status_message based on store_open.

3

Use a Boolean expression to check if the store is closed

Create a variable called is_closed and set it to the result of checking if store_closed is True.

Python

store_open = True
store_closed = False
status_message = 'Store is open' if store_open else 'Store is closed'
# Create a variable called is_closed that checks if store_closed is True
# Your code here

Hint

Compare store_closed to True to get a Boolean result.

4

Print the store status and closed check

Print the status_message variable. Then print the is_closed variable on the next line.

Python

store_open = True
store_closed = False
status_message = 'Store is open' if store_open else 'Store is closed'
is_closed = store_closed == True
# Print the status_message and is_closed variables
# Your code here

Hint

Use two print statements to show the messages on separate lines.

Practice

1. Which of the following is a Boolean value in Python?

easy

A. yes

B. "True"

C. True

D. 1

Solution

1. Step 1: Understand Boolean values

   Boolean values in Python are exactly True or False, not strings or numbers.

2. Step 2: Identify the correct Boolean

   True is the Boolean value True. "yes", "True", and 1 are not Boolean types.

3. Final Answer:

   True -> Option C

4. Quick Check:

   Boolean = True or False [OK]

Hint: Look for exact True or False without quotes [OK]

Common Mistakes:

• Confusing string "True" with Boolean True
• Using numbers like 1 as Boolean
• Thinking any word means Boolean

2. Which of these is the correct way to write a Boolean value in Python?

easy

A. False

B. true

C. FALSE

D. false

Solution

1. Step 1: Recall Python Boolean syntax

   Python Boolean values start with a capital letter: True and False.

2. Step 2: Check each option

   Only False, False, is correctly capitalized. Others are lowercase or all caps, which are invalid.

3. Final Answer:

   False -> Option A

4. Quick Check:

   Booleans start with uppercase [OK]

Hint: Booleans start with uppercase T or F [OK]

Common Mistakes:

• Writing booleans in lowercase
• Using all uppercase letters
• Confusing with strings

3. What will be the output of this code?

print(5 > 3)

medium

A. Error

B. False

C. 5 > 3

D. True

Solution

1. Step 1: Evaluate the comparison

   The expression 5 > 3 checks if 5 is greater than 3, which is true.

2. Step 2: Understand print output

   Printing a Boolean expression prints True or False accordingly. Here it prints True.

3. Final Answer:

   True -> Option D

4. Quick Check:

   5 > 3 is True [OK]

Hint: Compare values; print shows True or False [OK]

Common Mistakes:

• Thinking it prints the expression as text
• Confusing True with string 'True'
• Expecting an error from comparison

4. Find the error in this code:

if True = 5:
    print("Yes")

medium

A. Assignment used instead of comparison

B. Missing colon after if

C. True cannot be used in conditions

D. Indentation error

Solution

1. Step 1: Check the if statement syntax

   The code uses = which is assignment, not comparison. Conditions need ==.

2. Step 2: Identify the error type

   Using = in an if condition causes a syntax error because assignment is not allowed there.

3. Final Answer:

   Assignment used instead of comparison -> Option A

4. Quick Check:

   Use == for comparison, not = [OK]

Hint: Use == to compare, = is for assigning [OK]

Common Mistakes:

• Using = instead of ==
• Forgetting colon after if
• Thinking True can't be in conditions

5. You want to check if a number n is NOT zero using Boolean logic. Which code correctly prints True if n is not zero, otherwise False?

hard

A. print(n == 0)

B. print(n != 0)

C. print(n = 0)

D. print(not n)

Solution

1. Step 1: Understand the condition

   We want to print True if n is NOT zero, so the condition should check n != 0.

2. Step 2: Evaluate each option

   print(n == 0) prints True if n is zero (wrong). print(n != 0) correctly prints True if n is not zero. print(n = 0) causes a syntax error (invalid syntax). print(not n) prints True if n is zero (because not 0 is True), so it's opposite.

3. Final Answer:

   print(n != 0) -> Option B

4. Quick Check:

   Use != to check not equal [OK]

Hint: Use != to check not equal, not = [OK]

Common Mistakes:

• Using = instead of !=
• Confusing not n with n != 0
• Using == instead of !=