This latest edition covers all the new functions and features that have been added to RPG IV, including explanation of all the alternate syntax options and the more than 30 new op codes and built-in functions. This book takes programmers through RPG IV, from its foundation to its most advanced techniques, detailing built-in functions and op codes with syntax tables that provide requisite information at a glance. Also included are more than 100 charts and tables showing showing rules and their applications, and more than 350 real-life code samples of functions and operations.