SOLID principles for software development
SOLID principles are five design guidelines for writing clean, maintainable, and scalable object-oriented software. The acronym stands for: S - Single Responsibility Principle (SRP) : A class should have one and only one reason to change. O - Open/Closed Principle (OCP) : Software entities should be open for extension but closed for modification. L - Liskov Substitution Principle (LSP) : Subtypes must be substitutable for their base types. I - Interface Segregation Principle (ISP) : No client should be forced to depend on methods it does not use. D - Dependency Inversion Principle (DIP) : Depend on abstractions, not on concrete implementations. 1. Single Responsibility Principle (SRP) Definition : A class should only have one responsibility or reason to change. Why? Simplifies maintenance and avoids unintended side effects when modifying code. Example : Bad : A class managing both user authentication and database operations. Good : Separate classes...