I am using the manual, and here is the section verbatim: —————————————————————————————————————————— 8.18.4 <>between/3, <>for/3
Templates between(+integer, +integer, ?integer) for(?integer, +integer, +integer) Description between(Lower, Upper, Counter) generates an sequence of backtracking choices instantiating Counter to the values Lower, Lower+1,…, Upper. for(Counter, Lower, Upper) is equivalent to between(Lower, Upper, Counter). This predicate is deprecated and new code should use between/3. —————————————————————————————————————————— Here are my results: david@server2:~/workspace/prolog/bookworm$ prolog GNU Prolog 1.3.0 By Daniel Diaz Copyright (C) 1999-2007 Daniel Diaz | ?- for(X,0,10), write(X), nl, fail. 0 1 2 3 4 5 6 7 8 9 10 no | ?- between(0,10,X), write(X), nl, fail. uncaught exception: error(existence_error(procedure,between/3),top_level/0) | ?- Again, what might I be missing here? Thank you, David Logan
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