Learn RPG-IV-AS400 with Real Code Examples

Ensure IBM i / AS/400 environment is available

Access to RPG IV compiler and development tools

Set up libraries for source code and program objects

Configure DB2 schemas and file systems

Verify user permissions for compilation and job execution

Access IBM i system

Create source libraries for RPG code

Set up DB2 files and schemas

Verify compile and execution authorities

Test small programs interactively before batch deployment

RPG source physical files (PF-SRC)

Service program modules

Display file DDS definitions

CL programs for job and workflow control

DB2 file and schema definitions

CRTBNDRPG - compile RPG IV program

STRDBG - start interactive debugger

WRKOBJ - list objects in library

CALL - invoke program or procedure

SBMJOB - submit batch job

EBCDIC character set support

Locale-specific date and number formats

DB2 and RPG support Unicode conversion for modern apps

Display files can handle international text

Data encoding consistent with IBM i settings

Accessible via IBM i terminals or emulators

Keyboard navigation and command-based

Role-based access control via IBM i authorities

Interactive display panels guide user input

Batch programs require correct object and library permissions

5250 text-based terminals

Display files (DSPF) for panels and menus

Field validation and labels for clarity

Scrolling and tabular layouts supported

Limited graphics; mainly text-focused UI

Procedures maintain local state during execution

Service programs maintain reusable routines

DB2 tables store persistent data

Batch jobs track status via job logs

Interactive screens hold user input temporarily

DB2 physical and logical files for primary data

Data structures and arrays in RPG for temporary storage

Logs and spool files for output

Input/output via display and printer files

Transactional consistency maintained by IBM i system