A design pattern is a general solution to the problems that developers face during software development. It's not necessary to use design patterns but they make code more understandable and readable. Each design pattern solves a particular problem. There are mainly 3 types of design patterns: 1. Creational These design patterns provide a way to create class objects while hiding their creation logic. i.e, the object need not to be created directly using new operator. Below are the types of creational design patterns. Factory Method Abstract Method Singleton Builder Prototype 2. Structural