I have recently begun to learn Ruby, and I am wondering why my code functions correctly in the Codeacademy interface but fails to run properly in the Mac Terminal?

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There can be several reasons why your code works in one environment and not in another. Some possible reasons include:

1. Version differences: Codeacademy may be using a different version of Ruby than the one installed on your local machine. This can cause differences in the behavior of specific functions or syntax.

2. Library dependencies: Your code may depend on specific libraries or modules that are installed on Codeacademy servers but not on your local machine.

3. Environment setup: The configuration of the Codeacademy environment may be different from the one on your local machine. This can include differences in the way paths, permissions, and dependencies are managed.

4. Typing errors: It's possible that there are typing errors in your code, that went unnoticed in Codeacademy but are preventing the program from running on your local machine.

To troubleshoot this issue, you should first try to identify the exact error message that is being displayed in the Terminal. This can help you narrow down the possible causes of the problem. Additionally, you can check the version of Ruby being used on Codeacademy and compare it with the one installed on your local machine. Finally, you can review your code carefully to ensure that there are no syntax errors or dependencies that are not properly installed.