defining functions at the end of a script file

[oxyopes]

Hallo,
for stylistic reasons I would like to define functions used in a script file
at the end of the file, after they were already called.
Is there a way to do that?

Optionally, I could group all functions in a separate file, but preferably
not a file for each function, since they woud not be used in other occations,
so I make my directory cleaner and work with fewer files.
Is there a way to do that as well?

I appreciate very much your help! Thanks in advance ...