I crammed everything into two variables and only used three lines. Is this bad code?

The short answer is no, it's not bad code. There's nothing wrong with it, and for simple things I would say this is fine.

The slightly longer answer is that I would not personally write it this way. I'd pull the calculation out into it's own variable, say difference, and use that to write to the document. Generally, I feel like this makes your code easier to read. However, much of this will come down to personal preference and there is no one right way to write code.

When it comes to formatting and commenting my code, I try to ask myself, "If I come back to this code some time in the future, will I be able to easily make sense of it? Can someone else easily make sense of it?" If the answer to those questions is yes, you're usually fine in my opinion.

Tangentially related to clarity, splitting the difference generally means taking the average of two things. It's a fun little program, but I might suggest changing the wording slightly.

Hopefully that helped, and maybe some others can weigh in with their thoughts on the matter. In any case, have fun and happy coding!

This is what I needed to know, thank you! I guess I didn't know if it was preferable to use as few lines of code as possible, but now i see that clarity takes priority over that.

And yes, the wording doesn't quite work at the end there. I will revise.

Thank you for your response!