Simple number finder

find.rb

def find(n)

  unless n < 2 || n % 2 == 0 && n != 2

    arr = []

    n.times do |a|
      arr.push(a) if a < (Math.sqrt(n) + 1).floor && a > 1
    end

    check = lambda {|num| n % num == 0}

    if arr.select(&check).empty?
      puts "SN ##{$c + 1}: #{n}"

      $c += 1
    end

  end

end

$c = 0
c = 0

puts 'How many simple numbers do you need?'
count = gets.chomp.to_i

until $c == count

  find(c)

  c += 1

end