Learn RPG-IV-AS400 with Real Code Examples
Updated Nov 27, 2025
Learning Path
Understand IBM i / AS/400 architecture
Learn basic RPG IV fixed-format syntax
Practice free-form RPG IV and modular procedures
Explore DB2 integration and SQL
Develop batch and interactive business programs
Skill Improvement Plan
Week 1: Fixed-form RPG IV basics
Week 2: Free-form syntax and procedures
Week 3: DB2 file handling and embedded SQL
Week 4: Interactive display files and batch processing
Week 5: Service programs and modular application design
Interview Questions
Explain the difference between fixed-format and free-form RPG IV.
How do you modularize RPG IV code using service programs?
Describe how RPG IV integrates with DB2 for IBM i.
What debugging techniques are available for RPG IV programs?
How do you handle batch and interactive program integration?
Cheat Sheet
F-spec/D-spec/C-spec/P-spec - fixed-format sections
Free-form syntax - modern RPG IV coding style
Procedure - modular function
Service Program - compiled reusable module
DB2 File - data source for RPG IV programs
Books
Programming in RPG IV
RPG IV Free-Form Syntax Guide
RPG IV and DB2 Integration
Mastering IBM i RPGLE
RPG IV Service Programs and Modularization
Tutorials
RPG IV Free-Form Basics
Service Programs and Modular RPG IV
Embedded SQL in RPGLE
Interactive Display File Programming
Batch Job Automation on IBM i
Official Docs
https://www.ibm.com/docs/en/i/7.5?topic=languages-rpg
https://www.ibm.com/docs/en/i/7.5?topic=languages-rpg-iv-rpgle
Community Links
IBM Community: RPG
RPG Café Forum
Stack Overflow RPGLE tag
YouTube RPG IV tutorials
Midrange.com IBM i discussions
Community Support
IBM Knowledge Center: RPG IV
Midrange.com forums
RPG Café online community
Stack Overflow RPGLE tag
YouTube tutorials for IBM i programming