prime?

prime-fis002-alex-au

#solution 1

def prime1?(number)
  2.upto(number-1) do |composite|
    return "#{number} is not prime" if number%composite == 0
  end
  return "#{number} is prime"
end

#solution 2

def prime2?(number)
  if number%2 == 0
    return false
  end
  number_to_check = 3
  while number_to_check < number
    return false if number%number_to_check == 0
    number_to_check +=2
  end
  puts "#{number} is prime"
end