This repository contains a collection of Python programs and exercises completed as part of my first-semester coursework.

This repository includes various Python scripts created during lab sessions for Semester 1 - Introduction to Python Programming.
Each file demonstrates the implementation of key programming concepts such as:

• Variables and Data Types
• Conditional Statements
• Loops (For and While)
• Functions and Recursion
• Lists, Tuples, and Dictionaries
• File Handling
• Basic Algorithmic Thinking

• Add, remove, and display students
• Calculate average marks
• Simple file handling for storing student data
• Basic login system for teacher authentication

• Calculate the surface area given the dimensions of the prism

• Rotate letters in a string by a given number of positions using ASCII manipulation

• Generate lists of numbers that are multiples of:
  • 5 and 6
  • 2 and 4

• Demonstrate list slicing with user-defined start and end indexes

• Count how many times a specific character appears in a string (case insensitive)

• Simple phonebook that:
  • Checks for existing contacts
  • Adds new contacts with validation
  • Ensures correct phone number length

• Use of fromkeys() and clear() functions in Python dictionaries

• Check if a value exists in a tuple
• Convert a list into a tuple

• Read a text file
• Count and display the frequency of each alphabet character