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REXX Programming
Mainframe Training Overview

This is an introductory class to the REXX programming environment. It is intended for those new to REXX programming and covers all the fundamentals of the language

Mainframe Training Audience

Anyone with a need or desire to learn and understand the REXX programming language. Familiarity with TSO/ISPF is required.

Mainframe Training Course duration

3 Days

Mainframe Training Course outline

Overview
  • Terminology
  • Data structures
Running REXX programs under TSO/E
  • Establishing libraries
  • Invoking REXX procedures
  • Terminating REXX procedures
Writing the first REXX procedure
  • External Data Queue (EDQ) - Data stack
  • PARSE/PULL keywords
  • QUEUED() built-in function
  • TRACE diagnostics
Expressions and Operators
  • The REXX expression
  • Operators
    • Arithmetic
    • Comparison
    • Logical
Assignments and Variables
  • Dealing with variables
  • PARSING
  • Stem Variables
Conditional and Loop Logic
  • IF THEN ELSE
  • DO Loops
Subroutines and Functions
  • Internal vs external routines
  • PROCEDURE/EXPOSE clause
  • Recursion
Built-in Functions
  • REXX built-in functions
Additional Keyword clauses
  • PARSE clauses
  • DROP/NOP
TSO/E Built-in Functions
  • OUTTRAP()
  • LISTDSI()
  • SYSVAR()
  • MVSVAR()
FILE I/O
  • Using EXECIO

 
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16523 SW McGwire Ct.
Beaverton OR 97007
 
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