Simple To-Do List Application

This is a basic command-line To-Do List application written in Python. It's a simple, yet effective tool for managing your daily tasks. The application uses a text file (tasks.txt) to save and load tasks, ensuring your list is persistent across sessions.

---

Features

• Add Tasks: Add new tasks to your to-do list with a simple command.
• View Tasks: Display all current tasks in a numbered list. The program will let you know if there are no tasks to display.
• Mark as Done: Remove a task from the list by its index once it's completed. The program includes error handling for invalid input or indices.
• Data Persistence: Tasks are automatically saved to and loaded from a file, so you don't lose your list when you close the application.

---

How to Run

1. Prerequisites: Make sure you have Python 3 installed on your system.
2. Clone the Repository:

   git clone [https://github.com/YourUsername/your-repo-name.git](https://github.com/YourUsername/your-repo-name.git)
   cd your-repo-name

   (Remember to replace YourUsername and your-repo-name with your actual GitHub username and repository name.)
3. Run the script:

   python todo.py

---

Usage

When you run the application, you will be presented with a menu. Follow the on-screen instructions to interact with your to-do list.

• Enter 1 to add a new task.
• Enter 2 to view all tasks.
• Enter 3 to mark a task as done by its number.
• Enter 4 to exit the application. Your tasks will be saved automatically.

Example