To-do-list-

A simple Python-based To-Do List application that allows users to add, edit, delete, and mark tasks as completed, with task persistence through file storage.

To-Do List Application

Overview

This is a simple To-Do List application that allows users to add, edit, delete, display, and mark tasks as completed. Tasks are stored in a text file, allowing the app to remember the tasks even after closing and reopening.

Features

• Add Task: Add a new task to the list.
• Delete Task: Delete a task by its number.
• Edit Task: Modify an existing task.
• Mark Task as Completed: Mark a task as completed by appending - Completed to it.
• Display Tasks: View all tasks currently in the list.
• Persistent Storage: Tasks are saved to a file (tasks.txt) and loaded when the app restarts.

Requirements

• Python 3.x

Installation

1. Clone the repository or download the source code:

   git clone https://github.com/your-username/todo-list-app.git
   

Usage Start the app by running the Python script. You will be presented with a menu: 1: Add Task 2: Delete Task 3: Edit Task 4: Display Tasks 5: Mark Task as Completed 6: Exit the app and save tasks to a file. Follow the prompts to manage your tasks. Tasks will be saved to tasks.txt and will persist even after the app is closed.

Example To-Do List

1. Add Task
2. Delete Task
3. Edit Task
4. Display Tasks
5. Mark Task as Completed
6. Exit

Choose an option: 1 Enter a new task: Buy groceries Task 'Buy groceries' added.

Choose an option: 4 Your tasks:

1. Buy groceries

Code Explanation add_task(): Adds a new task to the list. delete_task(): Removes a task by its number. edit_task(): Edits an existing task. mark_completed(): Marks a task as completed. save_tasks_to_file(): Saves tasks to a text file. load_tasks_from_file(): Loads tasks from the text file on startup.