Скачать или смотреть Fixing the Exit Issue in Your Python Menu with While Loop

Learn how to construct a Python menu that exits correctly when the user selects an option, including step-by-step guidance and code snippets.
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This video is based on the question https://stackoverflow.com/q/64304061/ asked by the user 'Steven Wright' ( https://stackoverflow.com/u/14430378/ ) and on the answer https://stackoverflow.com/a/64304151/ provided by the user 'Kyle Hardinge' ( https://stackoverflow.com/u/14407392/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Fixing the Exit Issue in Your Python Menu with While Loop

Creating a user-friendly menu in Python is a fundamental task for beginners. However, many new programmers encounter difficulties, particularly when trying to implement a mechanism to exit the program smoothly. In this post, we will discuss a common problem where a menu created with a while loop does not exit as intended when the user selects a specific option. Let's explore how to fix this issue effectively.

The Problem: Why Doesn’t the Menu Exit?

You may have written a menu that functions correctly if the user immediately selects the exit option. However, if the user chooses other options before selecting the exit option, the while loop continues indefinitely, preventing the program from terminating as desired. For example, your initial code might look like this:

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In this code, the while loop condition does not work as intended after multiple user inputs, leading to confusion.

The Solution: Implementing a Variable to Track User Actions

To ensure the program can exit properly, you need to create a variable that tracks the user's selection and uses it for the while loop's condition. The steps to do this are as follows:

Step 1: Return the Action

Modify your main function to return the user's choice after executing the corresponding action. This part of the function will remain mostly unchanged but make sure to include a return statement for action:

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Step 2: Set Up the While Loop

Next, declare a variable outside the main function to keep track of the action returned. With this variable (returned_action), you can compare it in the while loop condition:

[[See Video to Reveal this Text or Code Snippet]]

The Final Code: Bringing It All Together

After making these adjustments, your complete code should look like this:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By following the outlined steps, you can successfully create a Python menu with a while loop that exits properly when the user selects the exit option. This not only enhances user experience but also reinforces fundamental programming concepts such as functions and loops in Python. Happy coding!