Given a number n, print n-th Fibonacci Number.

**Examples:**

Input : n = 2 Output : 1 Input : n = 9 Output : 34

The Fibonacci numbers are the numbers in the following integer sequence.

0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, â€¦â€¦..

Fibonacci series adds two previous numbers for nth Number. Here is the Mathematical Calculation.

F_{n} = F_{n-1} + F_{n-2}

F0 = 0,

F1 = 1,

F2 = F0 + F1 = 1 + 1 = 2;

F3 = F2 + F1 = 2 + 1 = 3;

Now, We can use same solution into program for the solution.

```
/**
* 3. Fibonacci series
*/
function fibArr(num) {
let arr = [];
arr[0] = 0;
arr[1] = 1;
for (let i = 2; i < num; i++) {
arr[i] = arr[i-1] + arr[i-2];
}
return arr;
}
console.log(fibArr(2));
console.log(fibArr(9));
```