backtracking in prolog

Simple Input-Output in Prolog We can read the data using the following predicates of Prolog: seeing(File) see(File) read(Data) seen To provide the…

Unification in Prolog We will give a goal to evaluate and Prolog will work through the clauses in the database. In this,…

Satisfying Goals Summary The following diagram shows the methods which were described in the previous section. Figure: Evaluating a Sequence of Goals…

Variables in Prolog In the head or body of the clause, the variables are used. Variables are also used in goals, and…

Prolog Syntax The syntax of Prolog is as follows: Symbols Using the following truth-functional symbols, the Prolog expressions are comprised. These symbols…

Input and Output Terms in Prolog Prolog provides the facility to enable the input and output either of character or of terms.…

The Cut Predicate In this section, we will provide two examples of predicate definitions. These definitions look correct, but when we use…

Input and Output Using Characters The input term and output term are straightforward. Sometimes it is complex to use the full stops…

Two Factorial Definitions It is used to find out the factorial functions. The stating of these definitions is as follows: factorial(0,1). factorial(N,F)…

Lists and Sequence in Prolog In Prolog, the list builder uses brackets[…]. A list is referred by the notation [A | B]…