Editing Nested function (section)

=== Modularity ===

A common alternative is to leverage a language's modularity technology. Some functions are exposed for use outside of the module and some are only visible within the module.

In C, this can be implemented by declaring functions and variables as ''static'' to hide them from code outside the file.<ref name=cfaq>"[http://c-faq.com/misc/nestfcns.html Question 20.24: Why doesn't C have nested functions?], comp.lang.c FAQ</ref> This allows for data hiding, encapsulation and decomposition, but at a different level of [[granularity]] than with nested functions. This modularity does not support more than one level of nesting.

In [[object-oriented languages]], a class typically provides a scope in which functions and state can be hidden from consumers of the class but accessible within the class. Some languages allow classes to be nested.