Restructured Extended Executor Language

Restructured Extended Executor (REXX) language is a general-purpose, high-level language, not unlike PL/I, which is especially suited for prototyping and personal computing as well as handling exec command procedures. REXX is a free-format language that can be coded to emphasize its structure, making it easier to read.

Although REXX is easy to use, REXX programs are executed using the REXX/VM interpreter; thus, it tends to use more computer time than an equivalent compiled language.

The clause length maximum has been increased. It was 500 characters; now the actual limit is the amount of storage that can be obtained on a single request.

Note: Throughout this chapter, the term REXX/VM interpreter is called interpreter.