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Special variables: Difference between revisions
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Initially, the above three special variables aren't defined (until the appropriate action for their use has been performed).
If no commands have been issued to the host, the '''RC''' special variable isn't defined.
<br>If no subroutines have been invoked, then the '''RESULT''' special variable isn't defined.
<br>If no SIGNAL or CALL (or subroutine invocation) has been used, then the '''SIGL''' special variable isn't defined.
: (This excludes the use of '''SIGNAL ON xxx''' and/or '''SIGNAL OFF xxx''' instructions which don't actually transfer control.)
In each case, the variable names may be in lower/upper/mixed case.
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