# Python Truth Value Testing Explained - A Python Programming Tutorial **URL:** \ **Category:** freeCodeCamp Contributors\ **Tags:** guide\ **Created:** [July 11, 2016, 2:14am UTC](https://forum.freecodecamp.org/t/python-truth-value-testing-explained-a-python-programming-tutorial/19166 "2016-07-11T02:14:26Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![camperbot](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/camperbot/32/18364_2.png) [@camperbot](https://forum.freecodecamp.org/u/camperbot)\ **Post date:** [July 11, 2016, 2:14am UTC](https://forum.freecodecamp.org/t/python-truth-value-testing-explained-a-python-programming-tutorial/19166/1 "2016-07-11T02:14:26Z")
Any object can be tested for truth value, for use in an `if` or `while` condition or as operand of a Boolean operation like `and` , `or` , or `not` . The following values are considered false: - `None` - `False` - zero of any numeric type, for example, `0` , `0.0` , `0j` , `Decimal(0)` , `Fraction(0, 1)` . - any empty sequence, for example, `''` , `()` , `[]` , `set()` , `range(0)` . - any empty mapping, for example, `{}` . - instances of user-defined classes, if the class defines a ` __bool__ ()` or ` __len__ ()` method, when that method returns `False` or `0` . All other values are considered true – so objects of many types are always true. Operations and built-in functions that have a Boolean result always return `0` or `False` for false and `1` or `True` for true, unless otherwise stated. (Important exception: the Boolean operations `or` and `and` always return one of their operands.) ---
**Author:** ![kevcomedia](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/kevcomedia/32/125737_2.png) [@kevcomedia](https://forum.freecodecamp.org/u/kevcomedia)\ **Post date:** [August 7, 2017, 1:45am UTC](https://forum.freecodecamp.org/t/python-truth-value-testing-explained-a-python-programming-tutorial/19166/2 "2017-08-07T01:45:52Z")