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Effective programming with Rexx

A 3 day
HANDS ON
training course

REXX training course 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.

Key outcomes from this course

By the end of the course delegates will be able to:
  • Write REXX programs.
  • Debug REXX programs.
  • Examine existing code and determine its function.

REXX training course details

Who will benefit:
Anyone wishing to learn REXX.
Prerequisites:
None although experience in another high level language would be useful.
Duration:
3 days

Training approach

This structured training course seeks to build upon workbook learning through the use of group exercises, dynamic discussion and individual tasks in order to deliver an engaging and interactive module that will ensure all candidates are able to transfer their new skills into the workplace.

Overall ratings for this course:

Course review


"Hard concepts were explained very simply."
J. S., Framestore CFC
"Excellent presentation - very good course structure."
B. M., London Internet Exchange

REXX training course contents

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

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

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

Control structures
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.

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

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

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

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

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

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

REXX in batch
TSO/E foreground. TSO/E background.

Why Choose Us

SNT trainers score an average of over 90% on the three main areas of:
  • Ability to teach
  • Technical knowledge
  • Answering questions
“Excellently presented by a very knowledgeable and enthusiastic trainer.” P.D. General Dynamics

We limit our maximum class size to 8 delegates; often we have less than this. This ensures optimal interactivity between delegates and instructor.
"Excellent course. The small class size was a great benefit…" M.B. IBM

We write our own courses; courseware does not just consist of slides and our slides are diagrams not bullet point text. A typical chapter provides clearly defined objectives with a chapter overview, slides with text underneath, a quiz at the end to check the learning of the students. Hands on exercises are at the end and are used to reinforce the theory.

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