The Single Responsibility Principle (SRP) is a software design principle that states that every module or class should have only one reason to change, meaning that it should have only one job or responsibility.
This principle is one of the five principles of SOLID, a set of design principles for writing maintainable and scalable software. The SRP helps to reduce the complexity of software systems and make them easier to understand, test, and modify. When a module or class has multiple responsibilities, changes to one part of the module may affect other parts, leading to unintended consequences. By following SRP, you can ensure that changes to a single part of the system have minimal impact on the rest of the system.
For example, consider a class that calculates the total price of an order and also logs the order to a file. According to the SRP, this class should be split into two separate classes: one for calculating the total price and one for logging the order. This makes the system easier to maintain and modify, as changes to the logging functionality do not affect the calculation of the total price and vice versa.