This guide provides an introduction to the fundamentals of object-oriented programming (OOP) and how to use class diagrams to visualize and understand OOP concepts. It covers the basics of OOP, such as classes, objects, methods,
From Wikipedia
In software engineering, a class diagram in the Unified Modeling Language (UML) is a type of static structure diagram that describes the structure of a system by showing the system's classes, their attributes, operations, and the relationships among objects.