Tell us about the Single Responsibility Principle in SOLID.

A module or class should have only one reason to change, meaning it should perform only one specific function.

Applying this principle ensures:

• Clarity: Code is easier to read and understand.
• Maintainability: Changes in one area do not affect others.
• Testability: Modules can be tested independently.

For example, a class for managing users should not also handle sending emails or processing payments. These functions should be separated into different classes.