oracle - executing a procedure inside a package -

there package abc , many procedures inside it. want execute single procedure inside (say xyz). used below commands

begin abc.xyz; end;

i not able run same. can 1 getting unexpected symbol "begin" error

create package specification :

create or replace package pkg procedure xyz; end;

create package body :

create or replace package body pkg procedure xyz dbms_output.put_line('hi'); end end;

executing

exec pkg.xyz

begin pkg.xyz; end;

now, verify code , see have done wrong in code.

Lix