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What is the difference between == and = in Prolog?
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 2. The == "operator" differs in that it succeeds only if the two terms are already identical without further unification. Thus X == 2 is true only if the variable X had previously been assigned the value ...
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What does \\+ mean in Prolog? - Stack Overflow
What does \+ mean in Prolog? Asked 16 years ago Modified 7 years, 7 months ago Viewed 62k times
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math - Prolog =:= operator - Stack Overflow
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 does, and also ...
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syntax - Prolog "or" operator, query - Stack Overflow
Prolog "or" operator, query Asked 13 years ago Modified 12 years, 6 months ago Viewed 157k times
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What is the logical 'not' in Prolog? - Stack Overflow
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 implementations keep it for backwards-compatibility) but to be an idiomatic modern PL programmer, you probably should prefer to use \+.
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Newest 'prolog' Questions - Stack Overflow
How do I represent and manipulate atoms with capital letters in Prolog, without them being interpreted as variables? I'm developing a program in Prolog that interprets a chessboard notation. The input is a forsyth notation as a list containing pieces represented by letters, as in the example: [[t,c,b,r,d,r,b,c,t],8,... prolog chess Vitor Alves ...
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Define AND, OR, NOT operators in Prolog - Stack Overflow
SWI Prolog and GNU Prolog do not allow you to define arithmetic operators and functions. So X is 0 and 1. will fail due to and not being recognized. I'm not sure if there's a popular flavor of Prolog that allows it. @lurker I am not sure how Eclipse CLP is popular, I'll add a note in the answer
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How to run SWI-Prolog from the command line? - Stack Overflow
The SWI-Prolog build process put bin and lib under ~/bin and ~/lib Note: the -f flag disables loading the initialization ~/.plrc, and this could be necessary to get more 'strict control' over execution... I'm currently unsure if the documentation page is up-to-date with current SW status.
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What's the -> operator in Prolog and how can I use it?
I've read about it in a book but it wasn't explained at all. I also never saw it in a program. Is part of Prolog syntax? What's it for? Do you use it?
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operators - @< Symbol In Prolog - Stack Overflow
8 I want to know what @< means in Prolog? I encountered this symbol in this line of code while reading about the Bridge and Torch Problem: