How many design patterns are there in GoF?

Short Answer: GoF are mentioned to Design Patterns. And GRASP are Design Principles . Design Principles are so abstract than Design Patterns.

In this book, they introduced the concept of design patterns in software development. These authors became known as the Gang of Four. We will refer them as the GoF throughout this book. The GoF described 23 patterns that were developed by the common experiences of software developers over a period of time.

What is GoF in design patterns? GoF is actually a commonly used acronym that stand for Gang of Four . The Gang of Four refers to the four authors of the popular book on design patterns called “Design Patterns: Elements of Reusable Object-Oriented Software”.

These design patterns concern class and object composition. Concept of inheritance is used to compose interfaces and define ways to compose objects to obtain new functionalities.