--- pl:prolog:pllib:if_then [2019/06/27 15:50]
+++ pl:prolog:pllib:if_then [2019/06/27 15:50] (aktualna)
@@ Linia 1: / Linia 1: @@
+====== If then ======
+{{tag>statements}}
+===== Description =====
+If-then-else statement
+**Source**:  The Art of Prolog
+===== Download =====
+Program source code: {{if_then.pl}}
+===== Listing =====
+<code prolog>
+/*
+   if_then_else(P,Q,R) :- Either P and Q, or not P and R.
+*/
+     if_then_else(P,Q,R) :- P, !, Q.
+     if_then_else(P,Q,R) :- R.
+%   Program 11.10    If-then-else statement
+</code>
+===== Comments =====

pl/prolog/pllib/if_then.txt · ostatnio zmienione: 2019/06/27 15:50 (edycja zewnętrzna)

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