# Exercise 10 - Fibonacci
Create a function that returns a specific member of the Fibonacci sequence:
> A series of numbers in which each number ( Fibonacci number ) is the sum of the two preceding numbers.
> In this exercise, the Fibonacci sequence used is 1, 1, 2, 3, 5, 8...
> To learn more about Fibonacci sequences, go to: https://en.wikipedia.org/wiki/Fibonacci_sequence
```javascript
fibonacci(4); // returns the 4th member of the series: 3 (1, 1, 2, 3)
fibonacci(6); // returns 8
```