Mod 11 - Módulo 11

gistfile1.rb

def mod11(number, total)
  as_string = number.to_s
  sub = as_string.length
  value = 0
  max = total

  sub.times do |t|
    value += as_string[t].to_i * max
    max = max - 1
  end
  mod = (value % 11)
  mod = 0 if mod == 0 || mod == 1
  digito = total - mod
end