title: How to limit the number of digits input?
body: <p>I am requesting someone to tell me a program that asks a user to input only 9 digits. Number <code>0</code> not at start but having 9 digits. </p>
  
  <p>How can I limit the number of digits? </p>
  
  <p>For example:</p>
  
  <pre><code>Num=int(input('please Enter a Number'))
  if num?! 
  </code></pre>
  
  <p>Please help me soon.</p>