Fibonacci
Directions
Print out the n-th entry in the fibonacci series.
The fibonacci series is an ordering of numbers where
each number is the sum of the preceeding two.
For example, the sequence
[0, 1, 1, 2, 3, 5, 8, 13, 21, 34]
forms the first ten entries of the fibonacci series.
Examples:
fib(4) === 3
fib(7) === 13
fib(10) === 55
Solutions