nOnce a
function has been defined, it can be called by the user, provided the right number and kind of
arguments is supplied.
nThe user (caller) of a function maybe the main() function or other function (including itself -- recursive).
nFunctions
with defined return value can be used anywhere where a data value of the specified type can be used.
nFunctions
that return void are called
in a standalone function
call.
n