What is REXX in mainframe?
REXX is a scripting language that runs on many platforms, including z/OS, CMS, VSE, Windows, UNIX, Linux, and AS/400. REXX interfaces with GUIs, databases, and web server tools. Mainframe compilers are available for REXX. REXX is often compared to the Basic language because of its simplicity.
Where is REXX used?
It is often used for processing data and text and generating reports; these similarities with Perl mean that Rexx works well in Common Gateway Interface (CGI) programming and it is indeed used for this purpose.
Is REXX a programming language?
The REXX language is a versatile general-purpose programming language that can be used by new and experienced programmers.
Who uses REXX?
IBM’s
Rexx later spread to all IBM’s operating systems such as MVS, OS/2, and OS/400. Typically, Rexx, as a glue language, is used by staff who are not supposed to do any programming, such as systems programmers and infrastructure and middleware management groups.
How do you write a REXX program?
To write a line of output, you use the REXX instruction SAY followed by the text you want written. /* Sample REXX Program */ SAY ‘Hello world!’ This program starts with a comment line to identify it as a REXX program. A comment begins with /* and ends with */ .
How do I run REXX from JCL?
Using IRXJCL to run a REXX exec in MVS batch. To run an exec in MVS™ batch, specify IRXJCL as the program name (PGM= ) on the JCL EXEC statement. Specify the member name of the exec and one argument you want to pass to the exec in the PARM field on the EXEC statement. You can specify only the name of a member of a PDS.
How do you write REXX code?
What is REXX Cobol?
Rexx (Restructured Extended Executor) is designed to be a scripting language. Its goal is to make scripting as easy, fast, reliable, and error-free as possible.
How do you call REXX from REXX?
To explicitly call another program from within a program, use the EXEC command as you would any other REXX/CICS command. The called program should end with a RETURN or EXIT instruction, ensuring that control returns to the caller. The REXX special variable RC is set to the return code from the EXEC command.
What is IKJEFT01?
IKJEFT01 is the mainframe utility program that allows TSO commands to be run under JCL. When a REXX EXEC is run under IKJEFT01, the default host command environment is set to “TSO” by the REXX run-time system.
How do you call a program in REXX?
What is Systsin in mainframe?
The SYSTSIN and SYSTSPRT DD statements can refer to a sequential data set or a member of a partitioned data set. It is recommended that the SYSTSIN DD be defined as a fixed block format data set, with an LRECL of 80.
What is Systin JCL?
SYSTSIN is the standard input DD (i.e. Terminal Input) for either the TSO program (IJKEFT**) or the REXX interpreter (IRXJCL). SYSIN is a standard input DD, usually used to supply run-time parameters to the associated program.
What is the use of IKJEFT1B utility in JCL?
If a command or program being processed by IKJEFT1B ends with a system or user abend, IKJEFT1B causes the job step to terminate with a X’04C’ system completion code. IKJEFT1B also returns the completion code from the command or program in register 15.
How do I write an array in REXX?
Creating Arrays Arrays are created with the same naming convention which is used for variables in Rexx. Arrayname − This is the name provided to the array. Index − This is the index position in the array to refer to a specific element. Value − This is the value assigned to the index element in the array.
What does /* mean in JCL?
(7) /* marks the end of in stream data. All the JCL statements except in stream data starts with //. There should be at least one space before and after JOB, EXEC and DD keywords and there should not be any spaces in rest of the statement.
What is Dfsort in mainframe?
DFSORT is a program you use to sort, merge, and copy information. When you sort records, you arrange them in a particular sequence, choosing an order more useful to you than the original one. When you merge records, you combine the contents of two or more previously sorted data sets into one.
What is this Rexx tutorial?
This Rexx tutorial will be helpful for Mainframe application program / Mainframe system programmer, to make them comfortable in getting started with (Rexx) Restructured Extended Executor and its various functions. There are no prerequisites for this Rexx tutorial.
What does Rexx stand for?
The REstructured eXtended eXecutor (REXX) language is a high-level procedures language that enables inexperienced users as well as experienced programmers to combine REXX instructions and host commands and services into programs called REXX execs.
What address space can Rexx execute in?
REXX execs can execute in any MVS™ address space (both TSO/E and non-TSO/E). Application programs that are to be used in more than one environment For complete information about the topics discussed below, see z/OS TSO/E REXX User’s Guide and z/OS TSO/E REXX Reference.
What services does Rexx offer?
Db2 Rexx Connect Concepts ISPF/PDS Macro Commands with examples Rexx Skeleton and File Tailoring Services Rexx Debugging Facilities Rexx Interpret Commands Rexx Skeleton Examples