4️⃣ Logical Operators

Python has 3 logical operators. The logical operators always retuns boolean value (True/False or 1 or 0) as a result.

1) and:

It retuns True if both the values are True. Otherwise, it retuns False.

Below table explains the concept of logical and operater

Inputs		Output
A	B	A and B
False	False	False
True	False	False
False	True	False
True	True	True

💻 Example:

print(True and True)
print(1 and 1)

✅ Output:

True
1

💻 Example 1:

# Python program to demonstrate logical 'and' operator

a = 30
b = 70
c = -90

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:

# Python program to demonstrate logical 'and' operator

a = 20
b = 30
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

2) or:

It retuns True if any of the value is True and retuns False if both values are False.

Below table explains the concept of logical or operater

Inputs		Output
A	B	A or B
False	False	False
True	False	True
False	True	True
True	True	True

💻 Example:

print(True or True)
print(True or False)
print(False or True)
print(False or False)
print(1 or 1)
print(1 or 0)
print(0 or 1)
print(0 or 0)

✅ Output:

True
True
True
False
1
1
1
0

💻 Example 1:

# Python program to demonstrate logical 'or' operator

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:

# Python program to demonstrate logical 'or' operator

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

3) not:

It reverses the result. Returns True if input is False and vice versa.

Below table explains the concept of logical not operater

Input	Output
A	not A
False	True
True	False

💻 Example:

print(not False)
print(not True)
print(not 1)
print(not 0)

✅ Output:

True
False
1

💻 Example:

# Python program to demonstrate logical 'not' operator

x = 10

if not x > 10:
    print("True")
else:
    print("False")

✅ Output:

True

Follow below video to clear the concepts practically. Comparison and logical operators are explained in detail.

Be prepared with below questions prior to your interview !