Python True

The True keyword in Python is a Boolean constant that represents the logical value true. It is one of the two values of the bool data type (True and False). The True keyword is case-sensitive and must always be written with an uppercase T.

Example

is_raining = True

if is_raining:

    print("Take an umbrella!")

Output:

Take an umbrella!

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Syntax

variable = True

• True: Represents a logical true value in Python.

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Why Use True?

1. Control Flow: Used in conditional statements (if, while, etc.) to direct the program’s execution.
2. Logical Evaluations: Represents the result of logical expressions that evaluate to true.
3. Boolean Flags: Used as flags to indicate a state or condition in a program.

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Common Examples

1. Basic Usage in Conditionals

is_daytime = True

if is_daytime:

    print("Good morning!")

Output:

Good morning!

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2. Logical Expressions

x = 5

y = 3

result = x > y  # True because 5 is greater than 3

print(result)

Output:

True

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3. Using True in Loops

while True:

    print("This will run forever unless stopped!")

    break  # Stops the infinite loop

Output:

This will run forever unless stopped!

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4. Boolean Return Values

def is_even(number):

    return number % 2 == 0

print(is_even(4))  # Output: True

print(is_even(5))  # Output: False

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5. Using True as a Flag

keep_running = True

while keep_running:

    print("Program is running...")

    keep_running = False  # Change the flag to exit the loop

Output:

Program is running...