Learn Rpg - 10 Code Examples & CST Typing Practice Test
RPG (Report Program Generator) is a high-level programming language primarily used for business applications, especially on IBM midrange systems like AS/400 and IBM i, for generating reports and handling data processing tasks.
Learn RPG with Real Code Examples
Updated Nov 20, 2025
Practical Examples
Monthly sales report generator
Payroll calculation program
Inventory tracking and reorder alerts
Customer billing and invoicing
Financial statement preparation
Troubleshooting
Check file definitions and library paths
Verify calculation and format specifications
Ensure subprocedures are compiled
Debug record I/O errors
Check DB2 integration for correct queries
Testing Guide
Verify file I/O correctness
Test calculations with sample data
Check report formatting
Validate subprocedure execution
Compare outputs with expected results
Deployment Options
IBM i batch jobs
Interactive terminal programs
Integrated ERP modules
Web services using RPG backend
Legacy system maintenance and migration
Tools Ecosystem
IBM Rational Developer for i (RDi)
Source Entry Utility (SEU)
DB2 for IBM i
IBM i Navigator
Emulators for testing (e.g., MBAS, TN5250)
Integrations
DB2 relational database
Interactive CL programs
Batch job scheduling on IBM i
Web and GUI interfaces via APIs
ERP and legacy business systems
Productivity Tips
Use subprocedures for modular design
Leverage free-format RPG for readability
Test small units before integrating
Document calculations and report layouts
Automate batch jobs for efficiency
Challenges
Generate a monthly sales report
Build payroll processing program
Develop inventory tracking system
Create customer billing module
Maintain legacy IBM i applications
Frequently Asked Questions about Rpg
What is Rpg?
RPG (Report Program Generator) is a high-level programming language primarily used for business applications, especially on IBM midrange systems like AS/400 and IBM i, for generating reports and handling data processing tasks.
What are the primary use cases for Rpg?
Generating business reports. Batch data processing. Financial calculations. Inventory and logistics management. Legacy enterprise application maintenance
What are the strengths of Rpg?
Highly optimized for business data processing. Legacy systems are stable and reliable. Deep integration with IBM i/AS400. Efficient for batch report generation. Strong backward compatibility
What are the limitations of Rpg?
Steep learning curve for modern programmers. Legacy syntax can be cumbersome (fixed format). Limited use outside IBM i ecosystem. Modern web and GUI support is limited. Difficult to integrate with non-IBM systems
How can I practice Rpg typing speed?
CodeSpeedTest offers 10+ real Rpg code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.