====== Recursion ======
{{tag>recursion}}
===== Description =====
Example of recursion in Prolog


**Source**:  Learn prolog now! (course available on-line)


===== Download =====
Program source code: {{recursion.pl}}

===== Listing =====
<code prolog>
numeral(0).

numeral(succ(X)):-numeral(X).</code>
===== Comments =====