How to resolve the algorithm Return multiple values step by step in the Picat programming language

Published on 12 May 2024 09:40 PM
#Picat

How to resolve the algorithm Return multiple values step by step in the Picat programming language

Table of Contents

Problem Statement

Show how to return more than one value from a function.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Return multiple values step by step in the Picat programming language

Source code in the picat programming language

main =>
  [A,B,C] = fun(10),
  println([A,B,C]).

fun(N) = [2*N-1,2*N,2*N+1].

main => 
  pred(10, E,F,G),
  % ...

% A, B, and C are output variables
pred(N, A,B,C) =>
  A=2*N-1,
  B=2*N,
  C=2*N+1.

main =>   
  pred2(10, Ret),
  println(Ret),
  % or
  pred2(10,$ret(H,I,J)),
  println([H,I,J]).

% The structure $ret(A,B,C) contains the output values.
pred2(N, ret(A,B,C)) :-
  A=2*N-1,
  B=2*N,
  C=2*N+1.

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