<programming> The scope of an identifier is the region of a program source within which it represents a certain thing. This usually extends from the place where it is declared to the end of the smallest enclosing block (begin/end or procedure/function body).
An inner block may contain a redeclaration of the same identifier in which case the scope of the outer declaration does not include (is "shadowed" or "occluded" by) the scope of the inner.
