Modular programming is a software design technique that emphasizes separating the functionality of a program into independent, interchangeable modules, such that each contains everything necessary to execute only one aspect of the desired functionality. The goal of modular programming is to facilitate the construction of large software programs and systems by breaking them down into smaller, more manageable pieces.

Here are some key points about modular programming:

• Modules: A module is a separate software component that contains everything necessary to execute one aspect of the desired functionality. When modules are put together, they make up the executable program.

• Benefits: Modular programming can make code easier to read and understand, as it separates it into functions that deal with one aspect of the overall functionality. It can also make files smaller and easier to manage. Additionally, modular programming can help teams work collaboratively on large applications.

• History: Modular programming has been around since the 1960s, when developers began breaking up larger software programs into smaller parts. It is closely related to structured programming and object-oriented programming, both of which aim to break down large programs into smaller pieces.

• Implementation: Modular programming can be implemented in a variety of programming languages, and is now widespread in virtually all major languages developed since the 1990s. In C programming language, modular programming is implemented through functions or procedures, which are divided into smaller modules that handle specific responsibilities.

In summary, modular programming is a software design technique that emphasizes breaking down large programs into smaller, more manageable modules. This approach can make code easier to read and understand, and can help teams work collaboratively on large applications.