Nov 10, 2009 · What does \+ mean in Prolog? Asked 16 years, 2 months ago Modified 7 years, 9 months ago Viewed 62k times

Jan 25, 2021 · There are some special operators in Prolog, one of them is is, however, recently I came across the =:= operator and have no idea how it works. Can someone explain what this operator …

May 25, 2015 · The = "operator" in Prolog is actually a predicate (with infix notation) =/2 that succeeds when the two terms are unified. Thus X = 2 or 2 = X amount to the same thing, a goal to unify X with …

May 17, 2010 · Is there a way to do an if in prolog, e.g. if a variable is 0, then to do some actions (write text to the terminal). An else isn't even needed, but I can't find any documentation of if.

Feb 26, 2013 · What are the names of the algorithms and concepts used in Prolog? Logic programming Depth-first, backtracking search Unification See Sterling & Shapiro, The Art of Prolog (MIT Press) for …

Jun 13, 2010 · Hi Romain, thanks for the response! I've double and triple checked many times for anything in the buffer prior to the prolog (including hidden characters) but there simply isn't anything …

Feb 28, 2011 · 28 Try adding a space between the encoding="UTF-8" string in the prolog and the terminating ?>. In XML the prolog designates this bracket-question mark delimited element at the …

May 29, 2017 · If I have a prolog file defining the rules, and open it in a prolog terminal in windows, it loads the facts. However, then it shows the ?- prompt for me to manually type something. How can I …

In Prolog, the "not" is an example of "negation as failure", but it is felt that \+ will make it clearer to the programmer just what precisely is being asserted in any given rule. So you CAN use "not" (most PL …

Jul 24, 2018 · First of all I have already exhaustively checked the following questions and this issue does not seem to be the same thing: SAXParseException: Content is not allowed in prolog org.xml.sax.