What is a module in programming?

A module in programming is a self-contained unit of code that can be imported and reused in another program. It typically contains a set of related functions, classes, and variables that can be used together to accomplish a specific task. Modules are used to organize code and improve code reuse, making it easier to maintain and update software applications.

Modules are commonly used in object-oriented programming languages like Python, Java, and C++. In these languages, modules are typically stored in separate files and are imported into other programs using a simple syntax. For example, in Python, you can import a module by using the import statement followed by the name of the module:

import module_name

Once a module is imported, you can access its functions, classes, and variables using the dot notation, like this:

module_name.function_name()

There are also built-in modules that are included with programming languages, which provide additional functionality that can be used in a program.