simple VARRAY example

DECLARE
  TYPE Str_Array IS VARRAY(4) OF VARCHAR2(50);
  v_array  Str_Array;

  PROCEDURE PROCESS_ARRAY(v_str_array  Str_Array)
  AS
  BEGIN
    FOR i IN v_str_array.first .. v_str_array.last LOOP
      DBMS_OUTPUT.PUT_LINE('Hello '||v_str_array(i));
    END LOOP;
  END;

BEGIN

  v_array := Str_Array('John','Paul','Ringo','George');

  PROCESS_ARRAY(v_array);

  -- can also pass unbound Str_Array
  PROCESS_ARRAY(Str_Array('John','Paul','Ringo','George'));

END;

http://stackoverflow.com/questions/831188/how-to-create-a-stored-procedure-in-oracle-which-accepts-array-of-parameters