Below is my code.I have changed .push into >> as per instructions and Ido'nt remember about " Concatenation and the lesson is not passing
oire 'prime' # This is a module. We'll cover these soon!
return "n must be an integer." unless n.is_a? Integer
return "n must be greater than 0." if n <= 0
prime_array =  if prime_array.nil?
prime = Prime.new