EXIT                     Exit Structure

 EXIT {DEF | FOR | IF | LOOP | SELECT | SUB | WHILE}

    Immediate exit from within a function definition, a FOR/NEXT loop, an
    IF/THEN/ELSE block, a DO/LOOP loop, a SELECT block, a procedure
    (subprogram), or a WHILE/WEND loop.

   -------------------------------------------------------------------------

      Notes:    This statement is usually used to break out of a structure
                because some condition has been met.

                Make sure that a function assigns its return value before
                it EXITs.