>stem. = ''
If you want to protect your code from inadvertently using "undefined"
variables, i.e. variables that have not been assigned a value, you code
SIGNAL ON NOVALUE
With the above statement, the REXX interpreter will not detect when you're
using an "undefined" compound variable based on stem "stem.".
I don't use this default value assignment mechanism for the benefit of
detecting invalid variable references.
--
Peter Hunkeler
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