List length 2

Description

Determining the length of a list.

Source: The Art of Prolog

Download

Program source code: list_length_2.pl

Listing

/*
	mylength(Xs,N) :- The list Xs has N elements.
*/
 
	mylength([],0).
	mylength([X|Xs],s(N)) :- mylength(Xs,N).
 
%	Program 3.17: Determining the length of a list

Comments

pl/prolog/pllib/list_length_2.txt · ostatnio zmienione: 2017/07/17 08:08 (edycja zewnętrzna)
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