Procedures, Parameters & Sub-Programs

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make it easier to understand.

Programs are easier to modify. When repeated actions are replaced by one
procedure call, it becomes much easier to modify the code at a later stage, and
also correct any errors. By building up the program in a modular fashion via
procedures it becomes much easier to update and replace sections of the program
at a later date, if all the code for the specific section is in a particular
module.

Programs take less time to compile. Replacing a sequence of statements with
once simple procedure call usually reduces the compilation time of the program,
so long as the program contains more than one reference to the procedure!

Object programs require less memory. Procedures reduce the memory consumption
of the program in two ways. Firstly they reduce code duplication as the code
only needs to be stored once, but the procedure can be called many times.
Secondly, procedures allow more efficient storage of data, because storage for a
procedure's variables ...

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