How to resolve the algorithm Repeat a string step by step in the Prolog programming language

Published on 12 May 2024 09:40 PM
#Prolog

How to resolve the algorithm Repeat a string step by step in the Prolog programming language

Table of Contents

Problem Statement

Take a string and repeat it some number of times.
Example: repeat("ha", 5)   =>   "hahahahaha" If there is a simpler/more efficient way to repeat a single “character” (i.e. creating a string filled with a certain character), you might want to show that as well (i.e. repeat-char("*", 5) => "*****").

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Repeat a string step by step in the Prolog programming language

Source code in the prolog programming language

%repeat(Str,Num,Res).
repeat(Str,1,Str).
repeat(Str,Num,Res):-
    Num1 is Num-1,
    repeat(Str,Num1,Res1),
    string_concat(Str, Res1, Res).

:- system:set_prolog_flag(double_quotes,chars) .

repeat(SOURCEz0,COUNT0,TARGETz)
:-
prolog:phrase(repeat(SOURCEz0,COUNT0),TARGETz)
.

%! repeat(SOURCEz0,COUNT0)//2

repeat(_SOURCEz0_,0)
-->
! ,
[]
.

repeat(SOURCEz0,COUNT0)
-->
SOURCEz0 ,
{ COUNT is COUNT0 - 1 } ,
repeat(SOURCEz0,COUNT)
.

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