Generating a list of integers in a given range.

Source: The Art of Prolog

Program source code: integers_set.pl

/*
   range(M,N,Ns) :- Ns is the list of integers between M and N inclusive.
*/
     range(M,N,[M|Ns]) :- M < N, M1 is M+1, range(M1,N,Ns).
     range(N,N,[N]).
 
%  Program 8.12   Generating a list of integers in a given range