function fib_seq = fib_sequence(n)
    % Check for valid input
    if nargin == 0
        error('Please provide an input value.');
    end
    if ~isscalar(n) || n < 0
        error('Input must be a non-negative scalar value.');
    end
 
    % Initialize the Fibonacci sequence
    fib_seq = [0, 1];
 
    % Generate Fibonacci numbers using a while loop
    while true
        next_fib = fib_seq(end) + fib_seq(end-1);
        if next_fib > n
            break;
        end
        fib_seq = [fib_seq, next_fib];
    end
 
    % Handle the case where n = 0
    if n == 0
        fib_seq = [0];
    end
end

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