These manuals include information about general concepts, specific functions, and instructions about REXX programming.

Restructured Extended Executor (REXX) is the i5/OS implementation of the Systems Application Architecture® Procedures Language. REXX is a programming language that is supported by an interpreter provided as part of the i5/OS licensed program.

  • REXX/400 Programmer's GuideLink to PDF (854 KB)

    This guide provides a wide-range discussion of programming with REXX. Its primary purpose is to provide useful programming information and examples to those who are new to REXX and to provide those who have used REXX in other computing environments with information about the REXX implementation on i5/OS.

  • REXX/400 ReferenceLink to PDF (515 KB)

    This is a reference manual containing all of the IBM® REXX instructions and functions for the system. Also included are details about general concepts you need to know in order to program in REXX.

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