Understanding End of Cursor?

[AhmetYOL]

Hi all;
How can i catch end of the cursor?

CREATE OR REPLACE FUNCTION "public"."fnc_rapthsbordro" (bastar date, bittar date, basmuk integer, bitmuk integer, basmak varchar, bitmak varchar, siralama varchar, tip boolean) RETURNS varchar AS
$body$
declare intgelirkod integer;
declare intgelirkod1 integer;
declare  gelircurs   cursor for
  select gelirkod_idno from tbl_gelirkodlari order by gelirkod_idno;
begin

open gelircurs;
fetch gelircurs into intgelirkod;
while intgelirkod>0 loop

  intgelirkod1 = intgelirkod;

  fetch gelircurs into intgelirkod;

  if intgelirkod = intgelirkod1 then /* if previous */
    intgelirkod = 0;
  end if;

end loop;


end;
$body$
LANGUAGE 'plpgsql' VOLATILE CALLED ON NULL INPUT SECURITY INVOKER;

i make something above. it is working because gelirkod_idno is pirmary key and unique. But may be the way to handle the fetch staus.
Best Regards..

[AhmetYOL]

i found it in this forum.
in loop

  exit when not found;

tnks.