(a 4-day course)
The students will learn how to efficiently code the Restructured EXtended eXecutor (REXX) language. The course combines
theory with practical exercises.
The course covers REXX in general and its use in MVS-OS/390-z/OS & VM and on PC.
The students will learn the principles of logic programming techniques through the use of the REXX language.
After the training the students will be able to call, write and debug REXX programs.
All people who need to rapidly code efficient REXX programs.
Application programmers, systems programmers, operations analysts, end-users, ....
REXX is a multi-platform programming language.
Although our course includes the REXX extensions for MVS-OS/390-z/OS and VM-z/VM, the REXX knowledge you will acquire is
applicable to any platform.
There are no prerequisites.
The students must have access to an OS/390 or z/OS system and logon under TSO, or access to a VM or z/VM system and
logon under CMS, or use a PC on which a (free) REXX-interpreter is to be installed.
- Course contents
- The benefits of using REXX
- Classic REXX, SAA REXX, and ANSI REXX
- Literal strings
- Concatenation operators
- REXX special variables: RC, RESULT, and SIGL
- Compound symbols
- Constant symbols
- Arithmetic operators
- Comparative operators
- NUMERIC instruction
- Logical operators
- Operator precedence
- SIGNAL instruction
- CALL instruction
- Function call
- Arguments string
- Running a program under TSO/E
- Running a program under CMS
- Running a program on a PC
- Internal routines, built-in functions, and external routines
- IF construct
- NOP instruction
- Simple DO group
- Simple repetitive DO group
- Controlled repetitive DO group
- Complicated DO group
- LEAVE instruction
- ITERATE instruction
- SELECT group
- ADDRESS instruction
- Host command environments
- TRACE instruction
- TSO/E REXX commands
- INTERPRET instruction
- Character built-in functions
- Arithmetic built-in functions
- Writing your own mathematical functions
- Exception handling
- State built-in functions
- Interactive debugging
- Fixed-point numbers
- Conversion built-in functions
- I/O built-in functions
- Miscellaneous built-in functions
- TSO/E and VM/CMS external functions
- DROP instruction
- UPPER instruction
- PROCEDURE instruction
- EXIT instruction
- PARSE instruction
- Running a program in USS (the UNIX shell under MVS-OS/390-z/OS)
- Immediate commands
- Terminal read
- External data queue
- ARG instruction
- PULL instruction
- PUSH instruction
- External data queue buffers
- VM/CMS and TSO/E REXX EXECIO command
- SAY instruction
- Extended MCS console session
- VM/CMS and TSO/E external functions
- REXX in TSO/E and in non-TSO/E address spaces
- Foreground and background processing
Datatrain Course REXX I Programming
Datatrain Course REXX II Programming
Datatrain Course REXX I Programming for VSE
Datatrain Course REXX II Programming for VSE