Introduction to RPG IV

Now you can come up to speed quickly on the basics of programming in RPG IV-the modern modular AS/400 programming language that has gained acceptance worldwide. Completely up-to-date with all the new RPG IV features, this book tells you everything you need to understand the modern constructs of RPG IV, including figurative and named constants, operation extenders, and free-format expressions. You'll discover how to perform basic programming tasks such as opening files, processing data, communicating with the user, controlling workflow, and calling other programs. A must-have book for all beginning RPG IV programmers!