Python - Logical Operators

In this tutorial we will learn about Logical operators in Python.

Following are the list of Logical operators in Python

• Logical and
• Logical or
• Logical not

Click here if you want to read more about Boolean Algebra.

Logical and

The logical and operator will give True value if both the operands are True. Otherwise, it will give False.

Truth table of logical and operator.

In the following Python program we will get True only if both expressions evaluates to True.

# variables
a = 10
b = 20
x = 40
y = 50

m = a < b    # this will give True
n = y > x    # this will give True

print("Result: ", (m and n))

Output of the above code.

Result: True

Logical or

The logical or operator will give True value if any one of the operand is True. If both are False then it will return False.

Truth table of logical or operator.

In the following Python program we will get True if any one of the expression evaluates to True.

# variables
a = 10
b = 20
x = 40
y = 50

m = a <= b    # this will give True
n = y < x     # this will give False

print("Result: ", (m or n))

Output of the above code.

Result: True

Logical not

The logical not operator will give True value if the operand is False. And it will return False value if the operand is True.

Truth table of logical not operator.

In the following example we will get True only if the expression evaluates to False.

# variables
a = 10
b = 20

m = a > b    # this will give False

print("Result: ", (not m))

Output of the above code.

Result: True