Calculator CLI App (Python)

A simple and beginner-friendly Command Line Calculator Application built using Python.
This project performs basic arithmetic operations and runs continuously until the user chooses to exit.

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📌 Features

• ➕ Addition
• ➖ Subtraction
• ✖ Multiplication
• ➗ Division (with zero-division handling)
• 🔁 Menu-driven interface
• ❗ Input validation and error handling

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🛠️ Tech Stack

• Python
• VS Code / Any Text Editor
• Terminal / Command Line Interface

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📂 Project Structure

🚀 How to Run the Program

1. Install Python (if not installed):
   https://www.python.org/downloads/

2. Clone the repository or download the project folder.

3. Open a terminal inside the project directory.

4. Run the script:

   python calculator.py
            ┌──────────────────────────┐
            │        START              │
            └─────────────┬────────────┘
                          ▼
            ┌──────────────────────────┐
            │ Display Menu (1–5)       │
            └─────────────┬────────────┘
                          ▼
            ┌──────────────────────────┐
            │ Take user choice         │
            └─────────────┬────────────┘
                  ┌───────┴─────────┐
                  │ Is choice = 5 ? │
                  └───────┬─────────┘
                          │Yes
                          ▼
               ┌────────────────────┐
               │     EXIT APP       │
               └────────────────────┘
                          │No
                          ▼
            ┌──────────────────────────┐
            │ Take two numeric inputs  │
            └─────────────┬────────────┘
                          ▼
            ┌──────────────────────────┐
            │ Perform selected         │
            │ operation (+,-,*,/)      │
            │ + handle zero division   │
            └─────────────┬────────────┘
                          ▼
            ┌──────────────────────────┐
            │ Display Result           │
            └─────────────┬────────────┘
                          ▼
            ┌──────────────────────────┐
            │ Loop back to menu        │
            └──────────────────────────┘