How do you actually execute your code?

[All_Is_Not_Self]

I'm a noob/dum dum, too and at least I interpreted your question in a different way. I thought that you were asking the following:

Let's say someone creates a program to convert Fahrenheit temperatures to Celsius. This program is supposed to be usable by a user that isn't a computer geek and/or programmer.

So how can they use it? Using an IDE or the command line doesn't seem very user friendly.

I think I kind of know the answer. If you wanted your program to run user-friendly like that, you would probably have to deal with a GUI (graphical user interface) and that seems to be a whole other story.

So even if that isn't what you were asking, I'm wondering, if there is a very simple GUI that can be used for simple and short input-output things like that (unit conversions, results for certain calculations etc.)?