sub fib { my($n)=@_; if ($n<2) { return $n; } else { return fib($n-2)+fib($n-1); } } print fib(20), "\n"; link rel='alternate' title='Atom feed' href='https://git.ruby-lang.org/ruby.git/atom/internal/numeric.h?h=v1_8_5_54' type='application/atom+xml'/>
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