Re: Why not a setf-able NIL ?

Matthias Buelow wrote:
The primary purpose of the DATA statement is to give names to constants;
instead of referring to PI as 3.141592653589797, at every appearance,
the variable PI can be given that value with a DATA statement, and
used instead of the longer form of the constant. This also simplifies
modifying the program, should the value of PI change."

Granted, it's only bad wording but still funny. :)
It is not bad wording and it is not funny. The value of PI can change.
Just suppose you want to repeat calculations for a non-euclidean space.
.

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