Boolean Expressions

Boolean expression is an expression that is either true or false. The following example shows the use of the operator ==, which compares two operands and produces True if they are equal and False otherwise:

>>> 5 == 5

True

>>>5 == 6

False

True and False are special values that belong to the type bool, they are not strings. To prove this let’s apply type method:

>>>type(True)

>>>type(False)

The == operator is one of the comparison operators; the others are given in the following table.

Operator	Comment
x != y	# x is not equal to y
x >  y	#x is greater than y
x < y	# x is less than y
x >= y	#x is greater than or equal to y
x <= y	# x is less than or equal to y
x is y	# x is the same as y
X is not y	# x is not the same as y

Although these operations are probably familiar, the Python symbols are different from the mathematical symbols.

IMPORTANT: A common error is to use a single equal sign (=) instead of equal sign (==). One equal sign is an assignment operator and two equal signs are comparison operator.

Here are some examples of using Boolean operators

>>>  x= 10

>>>y= 20

>>> x != y

True

>>>x > y

False

>>>x < y

True

>>>x >= y

False

>>>x <= y

True

>>> x is y

False

>>>x is not y

True