       popd [ {+|-}n ]
              Removes  a entry from the directory stack, and per-
              form a cd to the new top directory. With  no  argu-
              ment,  the  current top entry is removed.  An argu-
              ment of the form +n identifies  a  stack  entry  by
              counting  from  the  left  of the list shown by the

              dirs command, starting with zero.  An  argument  of
              the   form  -n  counts  from  the  right.   If  the
              PUSHD MINUS option is set, the meanings of + and  -
              in this context are swapped.
