title: Python: Input validate with string length
body: <p>Ok so i need to ensure that a phone number length is correct. I came up with this but get a syntax error.</p>
  
  <pre><code>phone = int(input("Please enter the customer's Phone Number."))
  if len(str(phone)) == 11:
      else: phone = int(input("Please enter the customer's Phone Number."))
  phonumber.append(phone)
  </code></pre>