syntax - Prolog "or" operator, query - Stack Overflow
网页2012年11月22日 · I'm looking for an "or" operator. registered(X, Y), Y=ct101, Y=ct102, Y=ct103. Here's my query. What I want to write is code that will: "return X, given that Y is equal to value Z OR value Q OR value P". I'm asking it …
Define AND, OR, NOT operators in Prolog - Stack Overflow
网页2018年6月5日 · I have to define a prolog program which gives the truth table for a logic formula like this: where the logic variables can only have true or false value, and the only operators are AND,OR and NOT. The program should behave like this: table(a and (b …
Using And/Or in Prolog - Stack Overflow
网页2017年1月7日 · write a Prolog program whose main clause, solve(X), succeeds if and only if X is solvable. As background: An and-node is solvable if and only if all of its successors are solvable. An or-node is solvable if and only if at least one of its successors is solvable. A terminal node is solvable if it is a goal.
Prolog syntax and semantics - Wikipedia
网页The syntax and semantics of Prolog, a programming language, are the sets of rules that define how a Prolog program is written and how it is interpreted, respectively. The rules are laid out in ISO standard ISO/IEC 13211 [1] although there are differences in the Prolog implementations.
Prolog - Operators - Online Tutorials Library
网页Prolog - Operators. In the following sections, we will see what are the different types of operators in Prolog. Types of the comparison operators and Arithmetic operators. We will also see how these are different from any other high level language operators, how they are syntactically different, and how they are different in their work.
PROLOG Facts, Rules and Queries - Computer Science
网页Prolog expressions are comprised of the following truth-functional symbols, which have the same interpretation as in the predicate calculus. Variables and Names. Variables begin with an uppercase letter. Predicate names, function names, and the names for objects must begin with a lowercase letter.
Operators - SWI-Prolog
网页2011年9月3日 · In SWI-Prolog, operators are local to the module in which they are defined. Operators can be exported from modules using a term op(Precedence, Type, Name) in the export list as specified by module/2. Many modern Prolog systems have module specific operators. Unfortunately, there is no established interface for …
SWI-Prolog -- The SWI-Prolog syntax
网页According to the ISO standard and most Prolog systems, identifiers that start with an uppercase letter or an underscore are variables. In the past, Prolog by BIM provided an alternative syntax, where only the underscore (_) introduces a variable.
网页The alphabet of PROLOG consists of: C — a set of constant symbols (or constants, for short), V — a set of variable symbols (or variables, for short), F — a set of function (term) symbols, P — a set of relation (predicate) symbols. Meaning and Notation of Symbols.
网页Logic programming languages are declarative languages. Logic programming languages are nonprocedural. Instead of specifying how a result is to be computed, we describe the desired result and let the computer system figure out how to compute it. Prolog is an example of a logic programming language.