Boolean values (True and False) in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to assign the Boolean value True to the variable.

Python

is_active = [1]

Drag options to blanks, or click blank then click option'

ATrue

Btrue

C1

D"True"

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase 'true' instead of 'True'.

Using the string "True" instead of the Boolean True.

The Boolean value True in Python must be capitalized exactly as shown. Lowercase or strings are not Boolean values.

2fill in blank

medium

Complete the code to check if the variable is False.

Python

if is_ready == [1]:
    print("Not ready")

Drag options to blanks, or click blank then click option'

AFalse

Bfalse

C"False"

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase 'false' instead of 'False'.

Comparing to the string "False" instead of the Boolean False.

In Python, the Boolean value False must be capitalized exactly. Using lowercase or strings will not work as expected.

3fill in blank

hard

Fix the error in the code to correctly assign a Boolean value.

Python

is_valid = [1]

Drag options to blanks, or click blank then click option'

A1

Btrue

C"true"

DTrue

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase 'true' instead of 'True'.

Using the string "true" instead of the Boolean True.

The correct Boolean value is True with a capital T. Lowercase or strings are incorrect.

4fill in blank

hard

Fill both blanks to create a Boolean expression that checks if x is True and y is False.

Python

if x == [1] and y == [2]:
    print("Condition met")

Drag options to blanks, or click blank then click option'

ATrue

BFalse

Ctrue

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase 'true' or 'false'.

Using strings instead of Boolean values.

Boolean values must be capitalized: True and False.

5fill in blank

hard

Fill all three blanks to create a dictionary with Boolean values as keys and strings as values.

Python

status = [1]: "On", [2]: "Off", [3]: "Unknown"}

Drag options to blanks, or click blank then click option'

A{True

BFalse

CNone

DTrue

Attempts:

3 left

💡 Hint

Common Mistakes

Missing the opening curly brace.

Using lowercase Boolean values.

Using strings instead of Boolean or None.

The dictionary starts with a curly brace {. Keys are Boolean values True and False, and None is used for unknown.

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 !=