CREATE OR REPLACE FUNCTION arr_test(p_int integer)
  RETURNS integer AS
$BODY$
DECLARE
       i          integer;
       x          integer;
       y          varchar;
       arr        integer[];   --array
       arrch      varchar[];   --array
BEGIN
for i IN  1 .. 10  LOOP
    arr[i] := i* 10 ;   --write to arr
    arrch[i] := cast(i as varchar)||' loop';   --write to arr
    x := arr[i];      --read arr
    y := arrch[i];      --read arr
END LOOP;
 if p_int >  5  then
    raise exception 'char array: , %',y;
 end if;
   RETURN x;
END;
$BODY$
  LANGUAGE 'plpgsql' VOLATILE;
--
select arr_test( 1 );
select arr_test( 10 );