Fibonacci sequence function problem

I used this code to find the number of even elements in the Fibonacci Sequence up to a given number 'd'.

function y = evenFibo(d)
    k = 0;
    for i = 1:1:d
        a = fibonacci(i);
        if rem(a,2)==0
            k = k+1;
        else
            k = k+0;
        end
    end
  y = k;
end

But , it's repeatedly showing that "Undefined function 'fibonacci' for input arguments of type 'double'". How can I solve this problem?

Answer 1

[James Tursa]

The fibonacci( ) function was introduced in R2017a. What version of MATLAB are you running?

If you are running an earlier version, try this FEX submission from John D'Errico:

https://www.mathworks.com/matlabcentral/fileexchange/34766-the-fibonacci-sequence

[Mohammad Abir Hassan Sarker]

I'm using R2018a, it's working fine in my PC, but whenever I try to submit for Cody problems, the problem I mentioned earlier occurs