Not all algorithms can be specified in 20 lines or less. As a result,
we need to ``abstract'' out chunks of code with ``abstract operations''.
An ``abstract operation'' simply means ``we don't know/express how to
do this exactly''. An abstract operation is one that is not composed of
the basic types of statements (assignment, sequence, conditional statement
or loops).
This way, we can make algorithms appear shorter by hiding details.
Copyright © 2006-09-26 by Tak Auyeung
