Python Boolean
Table of Contents
Description
A Boolean in Python is a data type that represents one of two values:
True
False
Booleans are used in logical operations, comparisons, and control flow like if, while, etc. Internally, True is represented as 1 and False as 0. Booleans often result from comparison or logical expressions.
Prerequisites
- Familiarity with Python data types and variables.
- Basic understanding of conditional statements (like if, else).
Examples
Here's a simple program in Python:
# Boolean values
is_true = True
is_false = False
# Comparison operators return Boolean values
print(10 > 5) # True
print(3 == 7) # False
# Boolean in conditions
age = 18
if age >= 18:
print("Eligible to vote") # This will be printed
# Boolean operations
a = True
b = False
print(a and b) # False (both must be True)
print(a or b) # True (at least one is True)
print(not a) # False (negation)
# Boolean as result of type casting
print(bool(0)) # False
print(bool(5)) # True
print(bool("")) # False (empty string is False)
print(bool("hello")) # True
Real-World Applications
Checking user permissions and authentication.
Decision-making in control flows (if, while, for loops).
Validating form inputs or data entries.
Toggling states (e.g., turning features on/off).
Evaluating conditions in simulations or rule-based systems.
Where topic Can Be Applied
Web development: Login success/failure flags, feature toggles.
AI/ML: Boolean masks for selecting data or applying logic.
Game development: Collision detection, win/loss state
Data science: Filtering data with Boolean conditions.
IoT systems: Sensor ON/OFF, signal monitoring.
Resources
Topic video source
A comprehensive video
Python pdf
pdf on topic
Interview Questions
What is a Boolean in Python?
How are Booleans internally represented in Python?
What will bool([]) return? Why?
Explain the difference between and, or, and not.
How do Booleans behave in control flow structures?