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#+title: solid_principles

The SOLID principles are a set of five design principles that help software developers create maintainable, scalable, and flexible software systems. The principles were introduced by Robert C. Martin (Uncle Bob) and are widely used in object-oriented programming.

The SOLID principles are:

1. **Single Responsibility Principle (SRP)**: A class should have only one reason to change, meaning it should have only one job or responsibility. This makes the class easier to understand and maintain.
   
2. **Open/Closed Principle (OCP)**: Software entities (classes, modules, functions, etc.) should be open for extension but closed for modification. This means that you should be able to add new functionality without changing existing code, which helps prevent bugs and maintain stability.
   
3. **Liskov Substitution Principle (LSP)**: Subtypes must be substitutable for their base types without altering the correctness of the program. This means that objects of a derived class should be able to replace objects of the base class without affecting the behavior of the program.
   
4. **Interface Segregation Principle (ISP)**: Clients should not be forced to depend on interfaces they do not use. This means that it's better to have many small, specific interfaces rather than a few large, general ones, which helps reduce dependencies and improve flexibility.
   
5. **Dependency Inversion Principle (DIP)**: High-level modules should not depend on low-level modules; both should depend on abstractions. Additionally, abstractions should not depend on details; details should depend on abstractions. This principle encourages the use of interfaces and abstract classes to decouple high-level and low-level components.
   
[[id:F3875F0F-5C9E-4BB1-A79C-6000B9558115][solid_principles_examples]]
