ATM Banking System – Python OOP Project

📌 Project Overview

This project is a console-based ATM Banking System developed using Python and Object-Oriented Programming (OOP).

I built this project as a serious practice exercise to deepen my understanding of OOP concepts such as class design, encapsulation, method interaction, and structured program flow.

As an aspiring Data Scientist, I believe strong programming fundamentals are essential. This project reflects my effort to build that foundation through practical implementation.

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🚀 Features

• Account Creation
• Secure Login with 4-digit PIN
• Deposit and Withdrawal
• Balance Inquiry
• PIN Change
• Input Validation
• Exception Handling

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🧠 Technical Concepts Applied

• Object-Oriented Programming (OOP)
• Classes and Objects
• Encapsulation
• Dictionary for managing multiple accounts
• Exception Handling (try-except)
• Control Flow (Loops and Conditionals)
• Separation of Concerns (Logic vs Control)

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🏗 System Design Approach

The system is divided into two main classes:

Account Class

Handles all account-level operations:

• PIN verification
• Balance management
• Deposit and withdrawal logic
• PIN updates

ATM Class

Responsible for:

• Managing multiple accounts
• User authentication
• Menu handling
• Program execution flow

This separation improves readability, modularity, and scalability.

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📚 What This Project Represents

• A strong focus on understanding core programming fundamentals
• Practical implementation of OOP concepts
• Structured thinking while designing systems
• Continuous improvement and growth mindset

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⚙ How to Run

python atm.py

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## 👨‍💻 Author

**Amarnath Rastogi**  
Aspiring Data Scientist  
Currently strengthening core programming and OOP fundamentals through practical projects.

This is my second structured Python project, focused on building strong object-oriented design and error handling skills.

GitHub: https://github.com/your-username  
LinkedIn: https://linkedin.com/in/your-linkedin-id