return [ n ]
       Causes  a shell function or `.' script to return to
       script with the return status specified by n.  If n
       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
       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
       not been trapped.
