/usr/share/doc/ruby1.8-examples/examples/fib.rb is in ruby1.8-examples 1.8.7.352-2ubuntu1.6.
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1 2 3 4 5 6 7 8 9 10 | # calculate Fibonacci(20)
# for benchmark
def fib(n)
if n<2
n
else
fib(n-2)+fib(n-1)
end
end
print(fib(20), "\n");
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