Python Tutorials · Python If...Else

Logical Operators

Learn all about Logical Operators in this comprehensive tutorial.

5 min read beginner

Shorthand If

Nested If

•Logical operators are used to combine conditional statements.
•The and keyword is a logical operator, and is used to combine conditional statements.
•The or keyword is a logical operator, and is used to combine conditional statements.
•The not keyword is a logical operator, and is used to reverse the result of the conditional statement.
•You can combine multiple logical operators in a single expression.
•Understanding how logical operators work with different values:
•When combining multiple logical operators, use parentheses to make your intentions clear and control the order of evaluation.

Python Logical Operators

Logical operators are used to combine conditional statements. Python has three logical operators:

and - Returns True if both statements are true
or - Returns True if one of the statements is true
not - Reverses the result, returns False if the result is true

The and Operator

The and keyword is a logical operator, and is used to combine conditional statements. Both conditions must be true for the entire expression to be true.

python

a = 200
b = 33
c = 500
if a > b and c > a:
  print("Both conditions are True")

The or Operator

The or keyword is a logical operator, and is used to combine conditional statements. At least one condition must be true for the entire expression to be true.

python

a = 200
b = 33
c = 500
if a > b or a > c:
  print("At least one of the conditions is True")

The not Operator

The not keyword is a logical operator, and is used to reverse the result of the conditional statement.

python

a = 33
b = 200
if not a > b:
  print("a is NOT greater than b")

Combining Multiple Operators

You can combine multiple logical operators in a single expression. Python evaluates not first, then and, then or.

python

age = 25
is_student = False
has_discount_code = True
if (age < 18 or age > 65) and not is_student or has_discount_code:
  print("Discount applies!")

Truth Tables

Understanding how logical operators work with different values:

Condition 1	Condition 2	Result
True	True	True
True	False	False
False	True	False
False	False	False

Condition 1	Condition 2	Result
True	True	True
True	False	True
False	True	True
False	False	False

Using Parentheses for Clarity

When combining multiple logical operators, use parentheses to make your intentions clear and control the order of evaluation.

python

temperature = 25
is_raining = False
is_weekend = True
if (temperature > 20 and not is_raining) or is_weekend:
  print("Great day for outdoor activities!")

More Examples

python

username = "Tobias"
password = "secret123"
is_verified = True
if username and password and is_verified:
  print("Login successful")
else:
  print("Login failed")

python

score = 85
if score >= 0 and score <= 100:
  print("Valid score")
else:
  print("Invalid score")

Module quiz

2 questions

Which of the following is true about Logical Operators?

It is strictly typedIt is evaluated at runtimeIt requires explicit memory managementIt is deprecated

What is the most common pitfall when working with Logical Operators?

SyntaxErrorIndentationErrorNameErrorTypeError

Answer all questions to submit.

Shorthand If

Nested If

Logical Operators

AI Summary

Python Logical Operators

The and Operator

The or Operator

The not Operator

Combining Multiple Operators

Truth Tables

Using Parentheses for Clarity

More Examples

Module quiz