This 5 day course will introduce students to the skills necessary to code REXX execs in z/OS and OS/390 environments.A series of written and lab exercises will be used to reinforce the classroom education.

Programmers, technical support personnel, and other individuals that need to write REXX execs.

Upon successful completion of this course, the student will learn to:

• Create and allocate REXX libraries
• Invoke REXX execs and pass parameters to them
• Use REXX instructions to perform terminal I/O
• Perform arithmetic calculations and character operations
• Use such REXX programming constructs as:
• IF statements
• SELECT–WHEN constructs
• DO–WHILE and iterative DO loop sequences
• Debug REXX execs via the TRACE facility
• Issue TSO commands from REXX execs
• Trap TSO command output and process the output in the REXX exec
• Use ISOF services.
• Read and write sequential datasets.
• Code user developed REXX subroutines and functions
• Manipulate and access the REXX data stack.
• Create REXX based ISPF edit macros.
• Execute REXX execs in batch jobs.
• Compile and linkedit REXX execs.
• Write REXX execs that interact with DB2.
• Write REXX execs that issue MVS operator commands.

• Introduction to REXX
• REXX Language
• Accessing the Terminal
• Programming Techniques
• Debugging REXX Execs
• REXX Built-in Functions
• User Defined Subroutines and Functions
• Parsing Data
• TSO/E Processing in REXX
• Using ISPF Services in REXX
• File I/O
• Data Stack Processing
• ISPF Edit Macros
• Advanced REXX Topics
• Supplemental Topics (as time permits)

• Introduction to OS/390, Introduction to z/OS, or equivalent experience.
• TSO/ISPF, or equivalent experience.
• Previous experience in designing and coding application programs will enhance the results of this course.