What is modules?

In programming, a module is a self-contained unit of code that performs a specific task or set of related tasks. Modules promote code reusability, organization, and maintainability by allowing developers to break down large programs into smaller, more manageable pieces. They are commonly used to encapsulate functions, classes, variables, and other elements, which can then be imported and used in other parts of the application or in different projects entirely. This avoids code duplication and makes it easier to understand, debug, and update the software.