Python for Data Analytics • Lesson 11
Comparison & Logical Operators
Learn how Python compares values and combines conditions using comparison and logical operators — essential for decision-making and data analysis.
0 of 8 concepts completed
Complete the activity and related MCQ to unlock the next concept.
Comparison Operators Produce Booleans
Comparison operators compare two values and return a Boolean — True or False. They are the building blocks of every decision a program makes.
Learn by Seeing
Comparisons produce True or False
age = 21 age > 18 # True age > 30 # False
Every comparison returns a Boolean; nothing else.
Edit the value — see the comparison result live:
>>> 21 > 18
true
>>> 21 > 30
false
Every comparison returns a Boolean — True or False.
Interactive Activity
What does age > 18 return when age = 21?
Hint: 21 is greater than 18.
Python Analyst Mindset
Every filter is a Boolean expression
Whether you are filtering a DataFrame, writing an if statement, or building a SQL WHERE clause, the same operators appear. Learning them well in Python means you recognise them everywhere.
Compare
==, !=, >, <, >=, <=
Combine
and for all, or for any.
Negate
not flips the result.
Apply
Business rules become Booleans.
Frequently Asked Questions
Comparison & Logical Operators — FAQs
A single = assigns a value. Double == compares two values and returns True or False.
Use and when every condition must hold. Use or when at least one is enough.
As many as you need. Group with parentheses if the logic gets complex.
Yes. not binds tighter than and, which binds tighter than or. Use parentheses to be explicit.
Lesson Summary
What you learned
Check equality and inequality.
Strict greater-than and less-than.
Thresholds that include the boundary.
True only when every condition is True.
True when at least one condition is True.
Reverses a Boolean value.