Boolean Data Type in Python

In programming, it’s common to need to compare values with each other. To accomplish this, Python provides six comparison operators, which are listed in the following table:

The result of comparing two values is a boolean value: True or False.

a: int = 22
b: int = 404

print(a > b)
# -> False

a: int = 22
b: int = 404

print(a > b)
# -> False

In the case of a > b, the expression is a boolean expression. This refers to an expression that evaluates to a boolean value (True or False).

A variable that stores a boolean value is called a boolean variable. A boolean variable can hold either the value True or the value False. Intern, Python uses the value 1 to represent True and the value 0 to represent False.

x: bool = True
print(int(x))
# -> 1

y: bool = False
print(int(y))
# -> 0

x: bool = True
print(int(x))
# -> 1

y: bool = False
print(int(y))
# -> 0

In Python, there are three boolean operators (also known as logical operators):

• and: Returns True if both expressions on either side of the operator are true.
• or: Returns True if the expression on the left side of the operator or the expression on the right side of the operator is true.
• not: This operator inverts the value of an expression, as demonstrated in the following code:

>>> x = True
>>> y = not x
>>> print(y)
False

>>> x = True
>>> y = not x
>>> print(y)
False

The operators can also be combined, as shown in the following example:

>>> a = True
>>> b = False
>>> c = False

>>> a or (b and c)
True

>>> (a and b) or c
False

>>> a = True
>>> b = False
>>> c = False

>>> a or (b and c)
True

>>> (a and b) or c
False

More on data types in Python

• A brief overview of strings in Python
• Numeric Data Types in Python