상속 (Inheritance)

개념
- A object type (class) can be specialized into lower-level object types.
  - A graphic figure can be a line, a polygon, or a circle.
  - A student can be a undergraduate or a graduate student.
- Inheritance is a technique allowing new classes to be defined on top of existing classes, rather than rewriting the classes from the scratch.
  - Classes are created by first inheriting all the attributes and methods defined by some less specifics class (superclass) and
  - then adding increasingly specialized attributes and methods.
- Inheritance eliminates the redundancy of storing the same datum or procedure more often than necessary.
용어
- 수퍼 클래스 (Superclass)
- 서브 클래서 (Subclass)
- 클래스 상속 구조 (Class Inheritance Hierarchy)

Notes:

Terms
- Superclass: Base Class, Parent Class
- Subclass: Drived Class, Child Class