local EXPR
            You really probably want to be using "my" instead, because
            "local" isn't what most people think of as "local". See "Private
            Variables via my()" in perlsub for details.

            A local modifies the listed variables to be local to the
            enclosing block, file, or eval. If more than one value is
            listed, the list must be placed in parentheses. See "Temporary
            Values via local()" in perlsub for details, including issues
            with tied arrays and hashes.

            The "delete local EXPR" construct can also be used to localize
            the deletion of array/hash elements to the current block. See
            "Localized deletion of elements of composite types" in perlsub.