True

About Python

Python is a general-purpose programming language with readable syntax and a large library ecosystem. It is useful for automating tasks, analysing data and building services or machine-learning tools.

• Automation
• Data and AI
• Backend services

Created by

Guido van Rossum at CWI

First released

1991 · first public release

Version / standard

Python 3.14

Current stable release line. Patch releases provide further fixes.

In the real world

• Netflix: Data workflows and platform tooling
• Spotify: Klio audio and data pipelines
• LinkedIn: Offline generative-AI workflows

Facts checked 8 September 2026. Links open the sources; examples describe specific products or documented uses.

Syntax

True

Examples

is_authenticated = True
feature_enabled = True

if is_authenticated:
    print("User is logged in")

if feature_enabled:
    print("Feature is active")

age = 25
is_adult = age >= 18  # Evaluates to True

if is_adult:
    print("Access granted")
else:
    print("Access denied")

# Multiple conditions
has_permission = True
is_verified = True

if has_permission and is_verified:
    print("You can proceed")

count = 0

while True:
    response = input("Type 'quit' to exit: ")
    if response.lower() == 'quit':
        break
    count += 1
    print(f"You have entered {count} commands")

print("Loop exited")

# AND operator - both must be True
result1 = True and True   # True
result2 = True and False  # False

# OR operator - at least one must be True
result3 = True or False   # True
result4 = False or False  # False

# NOT operator - inverts the value
result5 = not True        # False
result6 = not False       # True

# Complex expression
is_weekend = True
has_money = True
is_sunny = False

go_out = is_weekend and has_money and (is_sunny or not is_sunny)
print(f"Should go out: {go_out}")

# Numeric comparisons
print(10 > 5)      # True
print(100 >= 100)  # True
print(5 == 5)      # True

# String comparisons
print("hello" == "hello")  # True
print("abc" < "xyz")       # True

# Membership testing
fruits = ["apple", "banana", "orange"]
print("apple" in fruits)  # True

# Type checking
print(isinstance(42, int))  # True

def validate_email(email):
    # Simple validation checks
    has_at = '@' in email
    has_dot = '.' in email
    is_long_enough = len(email) > 5
    
    is_valid = has_at and has_dot and is_long_enough
    return is_valid

# Test the validation
user_email = "user@example.com"

if validate_email(user_email) == True:
    print("Email is valid")
    print("Proceeding with registration")
else:
    print("Invalid email format")

Best practices

• Use True directly in conditions rather than comparing (if is_active: instead of if is_active == True:)
• Choose descriptive boolean variable names that read like questions (is_valid, has_permission, can_access)
• Remember that True is case-sensitive - it must be capitalized in Python
• Avoid redundant comparisons with True/False - the variable itself is already boolean
• Use True in while loops with break conditions for continuous processes
• Leverage True in complex boolean expressions with and, or, not operators for readable logic

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