Writing REXX execs (1 day)

Designed for: Applications programmers and operations analysts

Primary Objective: To create REXX procedures

Introduction to REXX

Concepts, how a program is interpreted, parsing, tokens.  Variable names, SYMBOL function, PROCEDURE.  Expressions: operators, data types, Boolean expressions, functions, built-in functions, arithmetic, translation; SYSEXEC, SYSPROC.

Programming techniques

Sequence control: DO loops, conditional loops, LEAVE, ITERATE, IF .. THEN .. ELSE, SELECT, NOP, EXIT, subroutines, CALL, ARG, RETURN, SIGNAL.  Using the program stack.  File handling.  Conversing with screen: SAY, PULL, parsing, place holders, text handling.

OS/390, JCL, DB2, CICS, VSAM, REXX

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