Object-oriented programming uses objects that communicate through messages. Objects send messages by invoking operations on target objects, and the number and kind of messages depends on the object's interface. Abstraction is used to manage complexity by capturing only relevant details about an object from a given perspective.

1. Object Oriented
Programming
By Noor Wali Khan
UOCH

2. Message
•Objects communicates through messages
•They send messages by invoking
appropriate operations on the target object.
•The number and kind of messages that can
be sent to an object depends upon its
interface.

5. Abstraction
•Abstraction is a way to cope with
complexity.
•Principles of Abstraction
“captures only those details about an
object that are relevant to current
perspective”