How to Get DDL of the Procedure or any object in oracle

use below sql to get the DDL of a specific object:

set long 32000

set long 90000

set heading off;

set echo off;

set pages 1000;

SQL> spool object_name.sql

SQL> select dbms_metadata.get_ddl('object_type','object_name','Owner of the object') from dual;

SQL> spool off

Thanks...