continue BLOCK
    continue
            When followed by a BLOCK, "continue" is actually a flow control
            statement rather than a function. If there is a "continue" BLOCK
            attached to a BLOCK (typically in a "while" or "foreach"), it is
            always executed just before the conditional is about to be
            evaluated again, just like the third part of a "for" loop in C.
            Thus it can be used to increment a loop variable, even when the
            loop has been continued via the "next" statement (which is
            similar to the C "continue" statement).

            "last", "next", or "redo" may appear within a "continue" block;
            "last" and "redo" behave as if they had been executed within the
            main block. So will "next", but since it will execute a
            "continue" block, it may be more entertaining.

                while (EXPR) {
                    ### redo always comes here
                    do_something;
                } continue {
                    ### next always comes here
                    do_something_else;
                    # then back the top to re-check EXPR
                }
                ### last always comes here

            Omitting the "continue" section is equivalent to using an empty
            one, logically enough, so "next" goes directly back to check the
            condition at the top of the loop.

            When there is no BLOCK, "continue" is a function that falls
            through the current "when" or "default" block instead of
            iterating a dynamically enclosing "foreach" or exiting a
            lexically enclosing "given". In Perl 5.14 and earlier, this form
            of "continue" was only available when the "switch" feature was
            enabled. See feature and "Switch Statements" in perlsyn for more
            information.