The Idea of Procedures
	v Procedures encapsulate computation for general application o A procedure’s operation should be hidden from view o It must be possible to give data to a procedure and get results back from the procedure o All of the possible eventualities must be considered v The procedure concept has two parts: o A procedure “declaration” -- defines how computation goes o Many procedure “calls” -- requests to have the procedure performed
			The fundamental idea of procedures: Whenever the procedure is called, “substitute” its definition