# 🧮 Simple Calculator with History (Python) #

A beginner-friendly Python calculator project that performs basic arithmetic operations and stores calculation history in a file.

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📌 Project Overview :

This project is a simple command-line calculator built using Python. It allows users to perform basic mathematical operations such as addition, subtraction, multiplication, and division.
It also includes a history feature that saves all calculations in a text file and allows users to view or clear the history anytime.

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Features :

• ➕ Addition
• ➖ Subtraction
• ✖️ Multiplication (supports * and x)
• ➗ Division with zero-division handling
• 📜 View calculation history
• 🗑️ Clear calculation history
• ⌨️ Shortcut commands for fast usage

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Technologies Used :

• Python
• File Handling
• OS Module
• Command Line Interface (CLI)

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📂 Project Structure :

Simple-Calculator/
│
├── main.py
├── History.txt
└── README.md

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🚀 How to Run the Project :

1. Make sure Python is installed on your system
2. Clone this repository
3. Open terminal in project folder
4. Run the command :

python main.py

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⌨️ Commands Used :

Command	Action
?	Show calculation history
-	Clear history
q	Exit program

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📝 Example Usage :

Enter calculation or command: 10+5
Result: 15
Enter calculation or command: ?
10+5=15
Enter calculation or command: -
Your history has been cleared.

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📈 Learning Outcomes :

• Understanding Python functions
• File handling (read, write, append)
• Error handling using try-except
• Basic input validation
• Building CLI-based projects

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Author :

Aditya Tiwari
MCA Student
Passionate about learning programming and building real-world projects.

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Feedback :

If you like this project, feel free to ⭐ star the repository and share your feedback.