Complete REXX programming

Description

A hands on training course covering the Restructured EXtended eXecutor (REXX) language. A large number of exercises are used to reinforce and emphasise lecture sessions.

What will you learn

REXX training course details

Anyone wishing to learn REXX.

None although experience in another high level language would be useful.

3 days

What is REXX? REXX environments, invoking a REXX exec, a sample REXX exec, REXX clause types.

Literal data, variable data, assignment, simple variables, compound variables, stem variables, constant data, numeric data, arithmetic operations, character manipulation, hexadecimal data.

Parse format, Parse examples, Parse arg, Parse pull, Parse value, special templates, place holders, literal templates, numeric templates, variable templates.

Relational conditions, logical operators, simple selection, looping: uncontrolled and controlled loops, infinite loops, conditional loops, controlling loops, leave, iterate, multiple selection, instructions for subroutines, exit.

Internal and external subroutines, call, ARG(), ARG(n)return, exit, scope of variables, procedure, functions, built in functions, overriding built in functions.

Command conventions, preparing to read a file, execio, limitations, execio for reading, DISKR, DISKRU, DISKW, return codes.

listdsi, msg, outtrap, prompt, sysdsn, sysvar, storage

Immediate commands, the trace facility, signal and call statements.

Text handling functions, string handling, word handling, arithmetic, data conversion, bit manipulation, environment.

Data stack structure, REXX instructions for the data stack, REXX functions for the data stack, TSO/E commands for the data stack.

TSO/E foreground. TSO/E background.