What is a Submodule in Software Development?

A submodule is a module that is included in another module. In other words, a submodule is a module that is a part of a larger module. The larger module, called the parent module, includes the submodule as one of its own components.

For example, consider a software application that has a feature for handling payments. This feature might be implemented as a separate module, which we'll call the "payment submodule". The payment submodule might include functions for processing different types of payments, such as credit card payments and bank transfers. The main application module, which we'll call the "parent module", might then include the payment submodule as one of its own components, allowing it to use the payment submodule's functions to process payments.

Submodules are useful when you want to reuse code across multiple modules or when you want to break up a large module into smaller, more manageable pieces. They can also be used to organize code into a logical structure that reflects the overall architecture of the software system.