The document provides an introduction to Python, detailing its history from creation in 1989 by Guido van Rossum to the release of Python 3.0 in 2008. It covers basic concepts including comments, variables, and data types such as lists, sets, and tuples, along with their characteristics. Additionally, it includes examples of syntax and rules for variable naming.

1. Introduction to Python
Faculty : Moushreeta Debroy
Programme : Python
Department : BCA
Semester : 1
Module : 1

2. History of Python
• 1989: Python conceived by Guido van Rossum.
• 1991: Python 0.9.0 released, included features like exception handling
and functions.
• 2000: Python 2.0 introduced list comprehensions and garbage
collection.
• 2008: Python 3.0 released with improvements, including better
Unicode support.

3. Example
Comments
• Single-line comments: # This is a
comment
• Multi-line comments: '''This is a
comment''‘
First Python program:
```
print("Hello, World!")
```
.

4. • Python uses indentation to define blocks of code.
Example:
```
if 5 > 2:
print("Five is greater than two!")
```

5. Variables in Python
What are Variables?
Containers for storing data values
• No Need to declare a variable type
• Python infers the type automatically
#Declaring Variables
x = 5
name = "John“

6. Naming Variables
Rules for Naming
• Must start with a letter or underscore (_)
• Can contain letters, numbers, and underscores
• Case-sensitive (name and Name are different)
• Examples:
• Valid: age, first_name, _count
• Invalid: 2name, first-name, first name

8. Data Types
• x = 10 # int
• y = 3.14 # float
• name = "Alice" # str
• is_valid = True # bool

9. Python Data Types Overview
List
• Ordered: Elements have a specific order.
• Mutable: Can be changed (add, remove, modify elements).
• Duplicates Allowed: Lists can contain duplicate elements.
Example:
my_list = [1, 2, 3, "apple", 3]

10. Python Data Types Overview
Set
• Unordered: Elements do not have a specific order.
• Mutable: Can add, remove, or modify elements.
• No Duplicates: Sets do not allow duplicate elements.
Example:
my_set = {1, 2, 3, "apple", 3}

11. Python Data Types Overview
Tuple
• Ordered: Elements have a specific order.
• Immutable: Cannot be changed once created (no adding, removing, or
modifying elements).
• Duplicates Allowed: Tuples can contain duplicate elements.
Example:
my_tuple = (1, 2, 3, “apple”, 3)

12. Thank you