Fibonacci sequence in Ruby (recursion)

Question

I\'m trying to implement the following function, but it keeps giving me the stack level too deep (SystemStackError) error.

Any ideas what the problem mi

Answer 1

Try this oneliner

def fib (n)
    n == 0 || n == 1 ? n : fib(n-2) + fib(n-1)
end
print fib(16)

Output: 987