When a function is called, what parameters are sent to it?

An application that uses user-defined functions has to provide function prototypes.

When a function calls another function in pep/9, describe the steps involved. How do they communicate information, and how does the calling software continue to run once the call is completed?

Predefined functions are less efficient than those that are defined by the user.

Why is it necessary to create function prototypes in a program with user-defined functions?

Whether or not the order in which parameters are specified when invoking a function that accepts multiple arguments is critical.

What are the assertions that describe how a function works?

What is the need for functions?

Why is defining functions so important when writing code?

Local declarations are those that are kept in the memory of the computer; but, how exactly are they kept in memory? If reaching one's objective can be done without making use of local declarations, then doing so is a waste of time. Why bother using value parameters when you can just use references as your arguments in any function? How crucial are value parameters when it comes to the processing of programmed data?