The document provides an introduction to Python programming, explaining the difference between an interpreter and a compiler, and detailing various data types such as lists, sets, and tuples along with their properties. It covers string operations, basic arithmetic with integers and floats, boolean data types, and basic operators like arithmetic, assignment, and comparison. The document serves as a foundational guide for first-semester BCA students learning Python.

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

2. Python as an Interpreter, Not a Compiler
Interpreter vs Compiler:
• Interpreter: Executes code line by line, translating each line into
machine code and running it immediately.
• Compiler: Translates the entire code into machine code at once,
creating an executable file before running.

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

5. 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]

6. 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}

7. 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)

8. Working with Strings
String Operations
• Concatenation: "Hello " + "World!“ #Output :"Hello World!"
• Repetition: "Hello" * 3 #Output:"HelloHelloHello"
String Methods
• upper(), lower(), len()
Example:
greeting = "Hello"
print(greeting.upper())
# Output: HELLO

9. Numbers in Python
Integers and Floats
• Integer: 5, -10
• Float: 3.14, -0.001
Basic Arithmetic
• Addition: 5 + 2
• Subtraction: 5 - 2
• Multiplication: 5 * 2
• Division: 5 / 2

10. Boolean Data Type
Booleans
• Represents True or False
Boolean Expressions
• Comparison operators: ==, !=, >, <

11. Converting Data Types
• int(), float(), str()
Example:
num_str = "123“
num_int = int(num_str)
print(type(num_int))
# Output: <class 'int'>
Type Conversion

12. Basic Operators
• Arithmetic Operators: +, -, *, /, // (floor division), % (modulus),
** (exponentiation).
• Assignment Operators: =, +=, -=, *=, /=
• Comparison Operators: ==, !=, >, <, >=, <=
• Logical Operators: and, or, not

13. Example:
• a= 5
• b = 2
• result = a + b # Addition
• is_greater = a > b # Comparison

14. Arithmetic Operators
Example:
a = 10
b = 3
print(a % b)
# Output: 1
print(a ** b)
# Output: 1000

15. Thank you