Module 2.7 : Python Operators

Introduction

Operators are one of the most important concepts in Python programming. Operators are special symbols used to perform operations on variables, values, and expressions.

Whenever you perform calculations, compare values, assign data, or evaluate conditions in Python, operators are being used.

In Artificial Intelligence, Data Science, Machine Learning, and software development, operators are frequently used for data processing, calculations, decision-making, feature engineering, and algorithm implementation.

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Learning Objectives

• Understand Python operators.
• Learn different categories of operators.
• Use arithmetic operators.
• Understand assignment operators.
• Learn comparison operators.
• Apply logical operators.
• Use membership, identity, and bitwise operators.

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What are Operators in Python?

Operators are symbols that tell Python to perform specific operations.

These operations can include:

• Mathematical calculations
• Value comparison
• Conditional evaluation
• Data assignment
• Membership testing

Example:

x = 10
y = 5

print(x + y)

Output:

15

In this example:

• x and y are operands.
• + is the operator.

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Categories of Python Operators

• Arithmetic Operators
• Assignment Operators
• Comparison Operators
• Logical Operators
• Identity Operators
• Membership Operators
• Bitwise Operators

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1. Arithmetic Operators

Arithmetic operators perform mathematical operations.

Operator	Description	Example
+	Addition	10 + 5
–	Subtraction	10 – 5
*	Multiplication	10 * 5
/	Division	10 / 5
%	Modulus	10 % 3
**	Exponent	2 ** 4
//	Floor Division	10 // 3

Addition Operator (+)

print(15 + 5)

Output:

20

Subtraction Operator (-)

print(20 - 5)

Output:

15

Multiplication Operator (*)

print(6 * 4)

Output:

24

Division Operator (/)

print(20 / 4)

Output:

5.0

Modulus Operator (%)

Returns the remainder after division.

print(10 % 4)

Output:

2

Exponent Operator (**)

print(2 ** 3)

Output:

8

Floor Division Operator (//)

print(10 // 3)

Output:

3

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2. Assignment Operators

Assignment operators are used to assign values to variables.

Operator	Description
=	Assign Value
+=	Add and Assign
-=	Subtract and Assign
*=	Multiply and Assign
/=	Divide and Assign

Basic Assignment

x = 100

print(x)

Output:

100

Add and Assign Example

x = 10
x += 5

print(x)

Output:

15

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3. Comparison Operators

Comparison operators compare values and return True or False.

Operator	Description
==	Equal To
!=	Not Equal To
>	Greater Than
<	Less Than
>=	Greater Than or Equal To
<=	Less Than or Equal To

Example:

a = 10
b = 20

print(a == b)
print(a < b)
print(a > b)

Output:

False
True
False

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4. Logical Operators

Logical operators combine conditions.

Operator	Description
and	Both conditions must be True
or	One condition must be True
not	Reverses the result

Example:

age = 25

print(age > 18 and age < 60)

Output:

True

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5. Identity Operators

Identity operators compare memory locations of objects.

Operators:

• is
• is not

Example:

x = [1,2]
y = x

print(x is y)

Output:

True

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6. Membership Operators

Membership operators check whether a value exists in a sequence.

Operators:

• in
• not in

Example:

courses = ["Python","AI","ML"]

print("Python" in courses)

Output:

True

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7. Bitwise Operators

Bitwise operators work with binary numbers.

Common bitwise operators:

• &
• |
• ^
• ~
• <<
• >>

Example:

print(5 & 3)

Output:

1

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Operator Precedence

Operator precedence determines which operation is executed first.

Example:

result = 10 + 5 * 2

print(result)

Output:

20

Multiplication happens before addition.

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Real-World Examples

E-Commerce Order Calculation

price = 1500
quantity = 2

total = price * quantity

print(total)

Output:

3000

Login Validation Example

username = "admin"

print(username == "admin")

Output:

True

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Python Example

x = 20
y = 4

print(x + y)
print(x - y)
print(x * y)
print(x / y)
print(x % y)

Output:

24
16
80
5.0
0

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Interview Questions

1. What are operators in Python?

Operators are symbols used to perform operations on variables and values.

2. Which operator performs exponentiation?

The ** operator performs exponentiation.

3. What is the difference between "=" and "=="?

"=" assigns a value while "==" compares values.

4. Which operator checks membership?

The "in" operator checks membership.

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Assignment

1. Create two variables and perform all arithmetic operations.
2. Use comparison operators with two numbers.
3. Create a logical operator example.
4. Create a list and test membership operators.
5. Write a small shopping cart program using operators.

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Quiz

Q1. Which operator is used for multiplication?

• A. +
• B. *
• C. %
• D. /

Answer: B. *

Q2. Which operator compares equality?

• A. =
• B. ==
• C. and
• D. in

Answer: B. ==

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Summary

In this tutorial, you learned Python Operators and their importance in programming. You explored arithmetic, assignment, comparison, logical, identity, membership, and bitwise operators.

Operators are essential for calculations, comparisons, decision making, and data processing in Artificial Intelligence and software development.

Next Tutorial

Tutorial 13: Lists and Tuples

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