Relational & Logical Operators in Python

  • December 2, 2022
  • python
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In Python, operators are specialized symbols that perform different computations. To create an expression, we combine operators and operands. Expressions are merely values’ representations. The fundamental building blocks of a program that define its functionality are relation and logic.

Relational operator:

Value comparisons are done using relational operators, also known as comparison operators. It responds to the condition by returning either True or False.

OperatorDescriptionSyntax
>Greater than: True if the left operand is greater than the rightx > y
<Less than: True if the left operand is less than the rightx < y
==Equal to: True if both operands are equalx == y
!=Not equal to – True if operands are not equalx != y
>=Greater than or equal to True if the left operand is greater than or equal to the rightx >= y
<=Less than or equal to True if the left operand is less than or equal to the rightx <= y
Example:
a = 9
b = 5

print(a < b)
print(a > b)
print(a == b)
print(a != b)
print(a >= b)
print(a <= b)
Output:
False
True
False
True
True
False
Logical Operators:

To decide on an expression, logical operators are mainly used. The following logical operators are supported by Python.

OperatorDescriptionExample
andIf both expressions are true, then the condition will be true. If a and b are the two expressionsa → true, b → true
then a and b → true.
orIf one of the expressions is true, then the condition will be true. If a and b are the two expressions,a → true, b → false => a or b → true.
notIf an expression a is true, then not (a) will be false and vice versa.a → true=> not a → false.
Example:
a = 5

print(2 < 3) and (2 < 5)
print(2 < 3) or (2 < 5)
print(not a)
Output:
True
True
False

Note: also read about Python Tuple

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