Python bool() Function

The Python bool() function returns boolean value of an object. In Python, everything is an object and when an object is passed as parameter in bool() function, it always returns True unless:

• The object is empty, like [], (), {}.
• The object is False
• The object is 0
• The object is None

Syntax

bool(object)

Parameters

Example:

In the example below, the bool() function is used on variables called MyString, MyList and MyNumber to return boolean value of these objects. As these objects are either empty or None, hence returns False.

MyString = ""
print(bool(MyString))

MyList = []
print(bool(MyList))

MyNumber = None
print(bool(MyNumber))

The output of the above code will be:

False
False
False

Example:

In the example below, the bool() function is used on variables called MyString, MyList and MyNumber to return True.

MyString = "Hello"
print(bool(MyString))

MyList = [1, 2, 3]
print(bool(MyList))

MyNumber = 15
print(bool(MyNumber))

The output of the above code will be:

True
True
True