About This Reference

This reference provides information about the RPG IV language as it is implemented using the ILE RPG compiler with the IBM i® (IBM i®) operating system, formerly Operating System/400® (OS/400®).

This reference covers:

• Basics of RPG IV:
  • RPG IV character set
  • RPG IV reserved words
  • Compiler directives
  • RPG IV program cycle
  • Indicators
  • Error Handling
  • Subprocedures
• Definitions:
  • Defining Data and Prototypes
  • Data types and Data formats
• RPG IV specifications:
  • Control
  • File description
  • Definition
  • Input
  • Calculation
  • Output
  • Procedure
• Ways to manipulate data or devices:
  • Built-in Functions
  • Expressions
  • Operation Codes