Python logical operators are used to combine conditional statements, allowing you to perform operations based on multiple conditions. These Python operators, alongside arithmetic operators, are special symbols used to carry out computations on values and variables. In this article, we will discuss logical operators in Python definition and also look at some Python logical operators programs, to completely grasp the concept.
Python # Example: Logical Operators (AND, OR, NOT) with generic variables a, b, c = True, False, True # AND: Both conditions must be True if a and c: print("Both a and c are True (AND condition).") # OR: At least one condition must be True if b or c: print("Either b or c is True (OR condition).") # NOT: Reverses the condition if not b: print("b is False (NOT condition).")
In Python, Logical operators are used on conditional statements (either True or False). They perform Logical AND, Logical OR, and Logical NOT operations.
| Operator | Description | Syntax | Example |
|---|
| and | Returns True if both the operands are true | x and y | x>7 and x>10 |
| or | Returns True if either of the operands is true | x or y | x<7 or x>15 |
| not | Returns True if the operand is false | not x | not(x>7 and x> 10) |
Truth Table for Logical Operators in Python
Truth Table for Python Logical Operators
AND Operator in Python
The Boolean AND operator returns True if both the operands are True else it returns False. 
Logical AND operator Examples
Python a = 10 b = 10 c = -10 if a > 0 and b > 0: print("The numbers are greater than 0") if a > 0 and b > 0 and c > 0: print("The numbers are greater than 0") else: print("Atleast one number is not greater than 0") Output
The numbers are greater than 0
Atleast one number is not greater than 0
Example 2: The code checks if all variables a, b, and c evaluate to True, printing a message accordingly.
Python a = 10 b = 12 c = 0 if a and b and c: print("All the numbers have boolean value as True") else: print("Atleast one number has boolean value as False") Output
Atleast one number has boolean value as False
Note: If the first expression is evaluated to be false while using the AND operator, then the further expressions are not evaluated.
Python OR Operator
The Boolean OR operator returns True if either of the operands is True.
Logical OR operator in Python Examples
Python a = 10 b = -10 c = 0 if a > 0 or b > 0: print("Either of the number is greater than 0") else: print("No number is greater than 0") if b > 0 or c > 0: print("Either of the number is greater than 0") else: print("No number is greater than 0") Output
Either of the number is greater than 0
No number is greater than 0
Example 2: The code checks if any of the variables a, b, or c has a boolean value as True; if so, it prints “At least one number has boolean value as True”, otherwise, it prints “All the numbers have boolean value as False”.
Python a = 10 b = 12 c = 0 if a or b or c: print("Atleast one number has boolean value as True") else: print("All the numbers have boolean value as False") Output
Atleast one number has boolean value as True
Note: If the first expression is evaluated to be True while using or operator, then the further expressions are not evaluated.
Python NOT Operator
The Boolean NOT operator works with a single boolean value. If the boolean value is True it returns False and vice-versa.
Logical NOT Operator Examples
The code checks if a is divisible by either 3 or 5, otherwise, it prints a message indicating that it is not. Let’s look at this Python NOT operator program to understand its working.
Python a = 10 if not a: print("Boolean value of a is True") if not (a % 3 == 0 or a % 5 == 0): print("10 is not divisible by either 3 or 5") else: print("10 is divisible by either 3 or 5") Output
10 is divisible by either 3 or 5
Order of Precedence of Logical Operators
In the case of multiple operators, Python always evaluates the expression from left to right. We can verify Python logical operators precedence by the below example.
Python def order(x): print("Method called for value:", x) return True if x > 0 else False a = order b = order c = order if a(-1) or b(5) or c(10): print("Atleast one of the number is positive") Output
Method called for value: -1
Method called for value: 5
Atleast one of the number is positive
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