Question

In MATLAB define a function named primes that takes a non-negative integer, ?, as its only argument and returns a row vector containing the first ? prime numbers in order. Assume that the first prime number is 2. Other than the zeros function, the ones function, and the colon (:) operator, you may not use any Matlab built-in array functions.

Answer 1

function [v] = primes(num)
    v = [];
    n = 2;
    while length(v) < num
        result = true;
        for i=2:n-1
            if mod(n, i) == 0
                result = false;
            end
        end
        if result
            v(1+length(v)) = n;
        end
        n = n+1;
    end
end