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Course Catalog » VSE Curriculum » VSE Series

REXX Programming II for VSE

Duration
2 hours

Overview

Description

The REXX Programming II for VSE course explains how to produce a structured REXX program and execute it in the VSE environment.

Audience

Programmers who require more advanced REXX programming skills.

Prerequisites

Completion of the Programming in REXX I course and knowledge of the fundamentals of REXX programming.

Objectives

After completing this course, the student will be able to identify:

  • How to write a structured REXX program, including the BLK_INIT, BLK_CALC, and BLK_SHOW procedures
  • How error messages are added

Course Content

Writing a Structured REXX Program

BLKSIZE Calculator as an Example Program

Structure of BLKSIZE EXEC and Parameters

Calculating Variables and Constants

Finished Program

The BLK_INIT Procedure

Subroutine BLK_INIT

Validate Input Parameters

Coding the Parameters

Return Codes

The BLK_CALC Procedure

How BLKSIZE Is Calculated

Arithmetic Functions

The BLK_SHOW Procedure

SAY Keyword

Formatting Displays

End/ Return Statement

Adding Error Messages

Setting Up Error Codes

Select an Alternate Action

Course Catalog » VSE Curriculum » VSE Series
 
 
 
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