How to resolve the algorithm Function definition step by step in the Prolog programming language

Published on 12 May 2024 09:40 PM
#Prolog

How to resolve the algorithm Function definition step by step in the Prolog programming language

Table of Contents

Problem Statement

A function is a body of code that returns a value. The value returned may depend on arguments provided to the function.

Write a definition of a function called "multiply" that takes two arguments and returns their product. (Argument types should be chosen so as not to distract from showing how functions are created and values returned).

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Function definition step by step in the Prolog programming language

Source code in the prolog programming language

multiply(A, B, P) :- P is A * B.

go :-
  multiply(5, 2, P),
  format("The product is ~d.~n", [P]).

test_multiply :-
  multiply(5, 2, 10),  % this will pass
  multiply(3, 4, 11).  % this will not pass

:- use_module(library(function_expansion)).

user:function_expansion(multiply(A, B), P, P is A * B).  % "function" definition

go :-
  format("The product is ~d.~n", [multiply(5, 2)]).

go :-
  A is 5*2,
  format('The product is ~d.~n', [A]).

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