Problem $2(20$ points$)$

Write a MATLAB program or Excel macro that will give you the nth Fibonacci number, where $n$ is a user input. In a Fibonacci sequence, each number is the sum of the previous $2.$ The first $10$ numbers are $0,1,1,2,3,5,8,13,21,34.$

Do not use the fibonacci function in MATLAB.

Hint: Only the nth number should be returned.