class Prime_number
 def get_value
   loop do
   print "enter number :"
   i = gets.chomp.to_i
   break if i == "exit"
   if i =~ /\d/ then
 prime = true
 for counter in 2..(Math.sqrt(i)) do
 if i % counter == 0 then
 prime = false
 end
 end
 if prime then
 puts "\n Given number is Prime, here are the preceding prime numbers."
   number = 7
     low_max = Math.sqrt(i)
     base_primes = {}
     current_pos = 0
     prime = true

     if i >= 2 # I need a few starter values
      puts "2"
      base_primes[current_pos] = 2
      current_pos = current_pos + 1
     end # if
     if i >= 3
      puts "3"
      base_primes[current_pos] = 3
      current_pos = current_pos + 1
     end # if
     if i >= 5
      puts "5"
      base_primes[current_pos] = 5
      current_pos = current_pos + 1
     end # if
     while number <= low_max # while number <= sqrt of max_number
                             # this will add all prime numbers up
                             # to low_max to the base_primes array
       for x in 0..base_primes.length  - 1
         if number % base_primes[x] == 0
          prime = false
         end # if
       end # for
       if prime == true
        base_primes[current_pos] = number
        current_pos = current_pos + 1
        puts number
       end # if
       prime = true
       number = number + 2
     end # while

     prime = true
     l_length = base_primes.length - 1
     current_position = 0
     while number <= i # Starting at the first number after low_max
                                # simply print all primes
       while prime == true and current_position <= l_length
         if number % base_primes[current_position] != 0
          prime = true
         else
          prime = false
         end # if
        current_position = current_position + 1
       end # while
       if prime == true
        puts number
       end # if
      current_position = 0
      prime = true
      number = number + 2
     end # while
 else
 puts "\n Given number is composite"
 end
 end
end
end
end
a = Prime_number.new
a.get_value


puts "thanks for using the prime number game"