Learn Rpg4 - 1 Code Examples & CST Typing Practice Test
RPG IV (also called RPGLE or ILE RPG) is IBM’s modern dialect of the RPG programming language used on the IBM i (AS/400) platform. It provides structured, modular, and database-integrated programming capabilities for building business applications, batch processing systems, and enterprise automation on IBM i.
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Learn RPG4 with Real Code Examples
Updated Nov 27, 2025
Monetization
Critical in enterprise automation
Supports long-lived custom ERP features
Reduces operational risk
Low cost of ownership for IBM i
High demand for modernization consulting
Future Roadmap
Continuous enhancements via IBM TRs
Improved free-form syntax
Better SQL integration
More modern API libraries
Gradual modernization of legacy RPG/400 apps
When Not To Use
Cross-platform applications
Front-end UI development
Cloud-native microservices
Real-time high-frequency streaming
Organizations without IBM i infrastructure
Final Summary
RPG IV is IBM’s modern enterprise language for IBM i.
Highly optimized for business logic and transactional workloads.
Deeply integrated with Db2 and the IBM i OS.
Supports modular, maintainable development via ILE.
A cornerstone of many mission-critical enterprise systems.
Faq
Is RPG still used? -> Yes, widely in enterprise IBM i systems.
Does RPG support free-form code? -> Yes, fully modern free-form.
Can RPG create APIs? -> Yes, via IWS or YAJL.
Is RPG portable? -> No, platform-specific.
Does RPG integrate with SQL? -> Yes, embedded SQL is supported.
Frequently Asked Questions about Rpg4
What is Rpg4?
RPG IV (also called RPGLE or ILE RPG) is IBM’s modern dialect of the RPG programming language used on the IBM i (AS/400) platform. It provides structured, modular, and database-integrated programming capabilities for building business applications, batch processing systems, and enterprise automation on IBM i.
What are the primary use cases for Rpg4?
CRUD operations on Db2 for i. Batch processing and scheduled jobs. Business logic for ERP systems. APIs and web service backends. Data transformation and ETL workflows
What are the strengths of Rpg4?
Extremely stable and reliable on IBM i. Fast transactional performance. Deep integration with system APIs. Backward compatibility across decades. Strong support for enterprise batch workflows
What are the limitations of Rpg4?
Niche language with limited talent pool. Legacy syntax still common in older systems. Platform-specific (IBM i only). Limited modern UI capabilities. Steep learning curve for non-IBM developers
How can I practice Rpg4 typing speed?
CodeSpeedTest offers 1+ real Rpg4 code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.