🏧 ATM Machine

A fully functional ATM Machine simulation built in Python — console-based banking with PIN security, deposits, withdrawals, and transaction history.

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📌 About The Project

A fully functional ATM Machine simulation built in Python. This console-based banking system allows users to:

• Check balance
• Deposit and withdraw cash
• View full transaction history

All secured with a PIN authentication system. Data is persisted across sessions using local file storage.

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✨ Features

Feature	Description
🔐 PIN Security	4-digit PIN with 3 attempt lockout
💰 Check Balance	View real-time account balance in PKR
📥 Deposit Cash	Add funds, balance saved instantly
📤 Withdraw Cash	Withdraw with insufficient-funds protection
📋 Transaction History	Every action timestamped and saved
💾 Data Persistence	Balance and history saved between sessions

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🚀 How To Run

# Step 1 — Clone the repository
git clone https://github.com/HaiderNeuralNet/ATM-Machine.git

# Step 2 — Navigate to project folder
cd ATM-Machine

# Step 3 — Run the program
python atm.py

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🔑 Default Credentials

PIN      : 8917
Balance  : 1000.00 PKR
Attempts : 3 tries before card blocks

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📁 File Structure

📁 ATM-Machine/
 ├── 📄 atm.py          ← Main program file
 ├── 📄 balance.txt     ← Stores current balance (auto-created)
 ├── 📄 history.txt     ← Transaction logs (auto-created)
 └── 📄 README.md       ← This file

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🐍 Python Topics Covered

#	Topic	Used For
01	Variables & Data Types	Storing balance, PIN, attempt count
02	File Handling	Read/write balance & transaction history
03	Exception Handling	Handle missing files gracefully
04	Functions	Modular ATM operations
05	Global Variables	Share balance across functions
06	Loops	PIN retry & main menu loop
07	Conditionals	Menu routing & fund validation
08	Modules (DateTime)	Timestamp all transactions

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👨‍💻 Author

HaiderNeuralNet

• GitHub: @HaiderNeuralNet
• Repo: ATM-Machine

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Built with ❤️ using Python