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mechanism > abstraction mechanism > encapsulation

encapsulation
subject			fact

encapsulation	allows changes to code to be more easily made since one can be confident that 'outsiders' are not relying on too many details
	has definition Creating a module to contain some algorithm or data structure, thus hiding its details behind the module's interface
	has purpose information hiding
	has purpose modularity
	has purpose to allow users to view an object as a black box that provides services, because objects encapsulate data and implementation.
	helps to achieve information hiding
	is a subtopic of Object Oriented Programming Concepts
	is a kind of abstraction mechanism
	separates the interface from the implementation of methods