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pred & succ ?



Dear C.l.i-p,

  In Pascal (and probably in other high-level languages,
but I don't know), there are built-in functions PRED(x)
& SUCC(x), where x is any ordinal-type variable.

e.g.:  PRED(1)=0
       SUCC(2)=3
       PRED(TRUE)=FALSE

etc., etc.

  Is there anything like this in IDL?

--  Andrew


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