generating numbers 1..N
From: vertigo (none_at_microsoft.com)
Date: 05/15/04
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Date: Sat, 15 May 2004 10:57:45 +0200
Hello
i use SWI-Prolog version 5.2.8.
I wanted to receive list with numbers 1..N.
I tried:
findall(I,for(I,1,N),List)
but there is no 'for' in this prolog.
I tried to do it by hand:
create(N,Numbers):-
create2(N,[],Numbers).
create2(N,IPath,OPath):-
conc(N,IPath,OPath),
Max is N-1,
((Max >0, create2(Max,IPath,OPath)) ; (Max=<0)).
conc([],[],[]).
conc([],L,L).
conc(L,[],L).
conc([X,L1],L2,[X,L3]):-
conc(L1,L2,L3).
but i always receive:
?- create(4,X).
No
Why ?
How can i solve this problem ?
Thanx
Michal
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