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Calculate the sum of a list of lists

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lauraberishaj

Programmer
Feb 16, 2007
4
0
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SE
I'm new in Prolog,
Can anybody help me how to calculate the sum of a list of lists?

Thank You,
Laura
 
sum([], 0) :- !.

sum(N, N) :- number(N), !.

sum([H|T], N) :-
sum(H, N1),
sum(T, N2),
N is N1 + N2.

--Did it ..yeeeaaahhhh
 
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