📄️ Introduction
It seems like you may have a typo in your question. I assume you meant to ask about the "SOLID principles." SOLID is an acronym that represents a set of design principles for writing maintainable and scalable software. These principles were introduced by Robert C. Martin and are widely used in object-oriented programming.
📄️ Single Responsibility
"A class should have only one reason to change."
📄️ Open/Closed
Software entities (such as classes, modules, or functions) should be open for extension but closed for modification.
📄️ Liskov Substitution
Objects of a superclass should be replaceable with objects of a subclass without affecting the correctness of the program.
📄️ Interface Segregation
A class should not be forced to implement interfaces it does not use, and clients should not be forced to depend on interfaces they do not use.
📄️ Dependency Inversion
High-level modules should not depend on low-level modules, but both should depend on abstractions. Additionally, abstractions should not depend on details; details should depend on abstractions.