Re: Repetition cycles

rsm a écrit : 
I have a lot of experience with languages such as C or Pascal. I am
beginning to learn prolog (SWI Prolog)  and I have a doubt: other languages
have several repetition structures like Repeat, While, For and prolog
haven't. How can we implement by example a For cycle with prolog?

Thank you for your help

Rui Silva


that's not the usual way to think about prolog (think in term of recursion)
but one could implement a for loop like this

for(I,J,Statement):-
	( I <= J  ->
	   call(Statement),
	   for(I+1,J,Statement) %line 4
	;
	  true
	).

maybe one could replace line 4 by
(New_I is I +1 , for(New_I,J,Statement))

.

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