To-Do List.py

def display_menu():
    print("\nTo-Do List Menu:")
    print("1. View tasks")
    print("2. Add task")
    print("3. Mark task as completed")
    print("4. Delete task")
    print("5. Exit")

def view_tasks(tasks):
    if not tasks:
        print("No tasks in the list.")
        return
    print("\nTasks:")
    for idx, task in enumerate(tasks, 1):
        status = "✓" if task['completed'] else "✗"
        print(f"{idx}. [{status}] {task['description']}")

def add_task(tasks):
    desc = input("Enter task description: ").strip()
    if desc:
        tasks.append({'description': desc, 'completed': False})
        print("Task added.")
    else:
        print("Empty task description not added.")

def mark_completed(tasks):
    if not tasks:
        print("No tasks to mark.")
        return
    try:
        num = int(input("Enter task number to mark as completed: "))
        if 1 <= num <= len(tasks):
            tasks[num-1]['completed'] = True
            print("Task marked as completed.")
        else:
            print("Invalid task number.")
    except ValueError:
        print("Please enter a valid number.")

def delete_task(tasks):
    if not tasks:
        print("No tasks to delete.")
        return
    try:
        num = int(input("Enter task number to delete: "))
        if 1 <= num <= len(tasks):
            removed = tasks.pop(num-1)
            print(f"Deleted task: {removed['description']}")
        else:
            print("Invalid task number.")
    except ValueError:
        print("Please enter a valid number.")

def main():
    tasks = []
    while True:
        display_menu()
        choice = input("Choose an option: ").strip()
        if choice == '1':
            view_tasks(tasks)
        elif choice == '2':
            add_task(tasks)
        elif choice == '3':
            mark_completed(tasks)
        elif choice == '4':
            delete_task(tasks)
        elif choice == '5':
            print("Goodbye!")
            break
        else:
            print("Invalid choice. Please try again.")

if __name__ == "__main__":
    main()