# 268. Missing Number

# @param {String} s
# @return {String}
def to_lower_case(s)
  bytes = s.bytes()
  bytes_len = bytes.length()

  ret = Array.new(bytes_len, 0)

  i = 0
  while i < bytes_len do
      b = bytes[i]
      ret[i] = (b >= 65 && b <= 90 ? b+32 : b).chr
      i += 1
  end

  return ret.join('')
end

def main()
  def r(s, exp)
    puts "to_lower_case(#{s}) = #{to_lower_case(s)} | exp: #{exp}"
  end

  r("Hello", "hello")
  r("here", "here")
  r("LOVELY", "lovely")
end


if __FILE__ == $0
  main()
end