Open/Closed Principle

The Open/Closed Principle is a concept in software development that suggests programs should be designed so they can be extended with new features without changing their existing code. Imagine a machine that can be upgraded by adding new parts without modifying its core structure—this makes software more flexible and easier to maintain. In essence, systems should be open to new ideas or functionalities but closed to modifications that could introduce bugs or errors, ensuring stability while allowing growth.