return [ n ]
       Causes  a shell function or `.' script to return to
       script  with the return status specified by n.   If
       the  return status is that of the last command exe-

       If return was executed from a trap  in  a   TRAPNAL
       effect   is  different for zero and non-zero return
       zero status (or after an implicit  return  at   the
       trap),   the  shell  will return to whatever it was
       cessing; with a non-zero status, the shell will be-
       rupted  except  that  the return status of the trap
       Note that the numeric value  of  the  signal  which
       is   passed   as   the   first   argument,  so  the
       $((128+$1))' will return the same status as if  the
       not been trapped.
