False

Syntax

False

Examples

is_logged_in = False
has_notifications = False

if is_logged_in:
    print("Welcome back!")
else:
    print("Please log in")  # This will print

if not has_notifications:
    print("No new notifications")  # This will print

# Numeric comparisons
print(5 > 10)      # False
print(3 == 7)      # False
print(100 < 50)    # False

# String comparisons
print("hello" == "world")  # False
print("abc" > "xyz")       # False

# List membership
numbers = [1, 2, 3]
print(5 in numbers)  # False

# Empty checks
print(bool([]))      # False - empty list
print(bool(""))      # False - empty string
print(bool(0))       # False - zero

# AND operator
result1 = False and True   # False
result2 = False and False  # False

# OR operator
result3 = False or True    # True
result4 = False or False   # False

# NOT operator
result5 = not False        # True

# Real-world example
is_admin = False
has_special_access = False
is_verified = True

can_view_panel = is_admin or (has_special_access and is_verified)
print(f"Can access admin panel: {can_view_panel}")  # False

def check_password_strength(password):
    # Check various requirements
    has_length = len(password) >= 8
    has_number = any(char.isdigit() for char in password)
    has_upper = any(char.isupper() for char in password)
    
    is_strong = has_length and has_number and has_upper
    return is_strong

# Test with weak password
user_password = "hello"
result = check_password_strength(user_password)  # Returns False

if result == False:
    print("Password is too weak")
    print("Requirements: 8+ characters, number, uppercase")

searching = True
attempts = 0
max_attempts = 3

while searching:
    attempts += 1
    user_input = input(f"Attempt {attempts}: Enter the code: ")
    
    if user_input == "1234":
        print("Correct code!")
        searching = False  # Exit loop
    elif attempts >= max_attempts:
        print("Too many attempts")
        searching = False  # Exit loop
    else:
        print("Wrong code, try again")

print("Process complete")

Best practices

• Write conditions positively when possible (if is_valid: instead of if not is_invalid:)
• Use "not" operator for better readability (if not is_active: instead of if is_active == False:)
• Remember that many values are "falsy" in Python (0, empty strings, empty lists, None)
• Initialize boolean flags with False when starting in a negative state
• Use False explicitly when you need to distinguish from None or 0
• Choose meaningful variable names that clearly indicate what False represents

At a glance

Purpose

Scripting and general-purpose applications

File extension

.py

Runs in

Python interpreter

Usually used with

Python standard library and packages

Specifications & further reading

• Python language reference

Related Python documentation