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2025-09-17 16:08:16 +08:00
parent 9395faa6b2
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--- a/perl/Examples/Chap5/factorial-0
+++ b/perl/Examples/Chap5/factorial-0
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+
+
+###
+### factorial0
+###
+
+## Chapter 5 section 4.2
+
+sub factorial {
+  my ($n) = @_;
+  return 1 if $n == 0;
+  return factorial($n-1) * $n;
+}