Null Clause

A null clause consists of only blanks or comments or both. The language processor ignores null clauses, but they make a program easier to read.
Comments
A comment begins with /* and ends with */. Comments can be on one or more lines or on part of a line. You can put information in a comment that might not be obvious to a person reading the REXX instructions. Comments at the beginning of a program can describe the overall purpose of the program and perhaps list special considerations. A comment next to an individual instruction can clarify its purpose.
Note: REXX/CICS does not require that a REXX program begin with a comment. However, for portability reasons, you may want to start each REXX program with a comment that includes the word REXX.
Not every language processor requires this program identifier. However, to run the same exec on MVS TSO and CICS, you should include the /* REXX */ program identifier to satisfy TSO requirements.
Blank lines
Blank lines separate groups of instructions and aid readability. The more readable a program is, the easier it is to understand and maintain.

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Timestamp icon Last updated: Tuesday, 7 January 2014


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