message: cast string to int
diff: @@ -2,10 +2,11 @@ def add(event, context):
  first_num = event["queryStringParameters"]['firstNum']
  if first_num is None:
  first_num = 0
  +
  second_num = event["queryStringParameters"]['secondNum']
  if second_num is None:
  second_num = 0
  - result = first_num + second_num
  + result = int(first_num) + int(second_num)
  print("The result of % s + % s = %s" % (first_num, second_num, result))
  return {'body': result, 'statusCode': 200}
  \ No newline at end of file
  