Python bool()

Anonymous contributor's avatar
Anonymous contributor
Published Jun 15, 2021Updated Sep 3, 2021
Contribute to Docs

Converts a value to a Boolean True or False value.

  • Career path

    Computer Science

    Looking for an introduction to the theory behind programming? Master Python while learning data structures, algorithms, and more!
    • Includes 6 Courses
    • With Professional Certification
    • Beginner Friendly.
      75 hours
  • Career path

    Data Scientist: Machine Learning Specialist

    Machine Learning Data Scientists solve problems at scale, make predictions, find patterns, and more! They use Python, SQL, and algorithms.
    • Includes 27 Courses
    • With Professional Certification
    • Beginner Friendly.
      95 hours

Syntax

bool(object)

Standard truth testing procedures are applied to values to determine their Boolean value. Statements are True if they do not meet one or more of these criteria:

  • If a False boolean value is passed.
  • If None is passed.
  • If a quantitative zero is passed, such as 0 or 0.0.
  • If an empty sequence or mapping is passed, such as (), [], or {}.
  • If Objects of Classes having bool() or len() method, returning 0 or False are passed.

Example 1

Use bool() function to return the boolean expression of the string 'True':

print(bool('True'))


# Output: True

Example 2

Use bool() function to return the boolean expression of the string 'False':

print(bool('False'))


# Output: False

Example 3

Use bool() to return the boolean expression of the integer 0:

Code
Output
Loading...


All contributors
Contribute to Docs
Learn Python on Codecademy
  • Career path
    Computer Science
    Looking for an introduction to the theory behind programming? Master Python while learning data structures, algorithms, and more!
    • Includes 6 Courses
    • With Professional Certification
    • Beginner Friendly.
      75 hours
  • Career path
    Data Scientist: Machine Learning Specialist
    Machine Learning Data Scientists solve problems at scale, make predictions, find patterns, and more! They use Python, SQL, and algorithms.
    • Includes 27 Courses
    • With Professional Certification
    • Beginner Friendly.
      95 hours