What does modular development refer to?

Modular development is an approach in software engineering that emphasizes breaking down a program into distinct, manageable components or modules. This method allows each module to be developed, tested, and debugged independently, which enhances the maintainability and scalability of the software. When a program is divided into smaller parts, it facilitates easier debugging and makes it easier for multiple team members to work on different components simultaneously.

This approach aligns perfectly with best practices in software design, promoting code reuse and better organization. It allows developers to focus on one aspect of a program at a time without needing to grasp the entire codebase's complexity. When changes or enhancements are needed, only the relevant modules need to be modified, reducing the risk of introducing bugs in other areas.

In contrast, testing variables within a single function, creating a single unit of programming code, or writing scripts without modular structure do not support the principles and benefits of modular development. Instead, these approaches may lead to more complex, monolithic code, making the software harder to manage and maintain in the long run.