Какое назначение у принципа открытости-закрытости из SOLID для разработки программного обеспечения?

The Open-Closed Principle from SOLID states that software entities (classes, modules, functions) should be open for extension but closed for modification.

This means that the behavior of the system can be extended without changing existing code, reducing the risk of errors and simplifying maintenance.

For example, instead of modifying an existing class to add new functionality, a new class that inherits from the base class is created, or interfaces and polymorphism are used to extend behavior.

This achieves flexibility and robustness of the architecture against changes.