Description: Nested functions refer to the practice of defining a function within another function, allowing for encapsulation and scope control. This technique is especially useful in programming languages where the goal is to keep code organized and modular. By nesting functions, one can access the local variables of the outer function from the inner function, facilitating the creation of complex logic without polluting the global namespace. Additionally, nested functions can help improve code readability by grouping related functionalities and allowing the programmer to maintain a clear focus on the execution flow. Nested functions are a powerful tool that encourages code reuse and the creation of closures, enabling inner functions to retain the context of their environment even after the outer function has completed its execution.
