title: Regular expression for Indian mobile phone numbers?
body: <p>I'm looking for a regular expression that will match text given the following requirements:</p>
  
  <ul>
  <li>contains only 10 digits (only numbers)</li>
  <li>starts with 9.</li>
  </ul>
  
  <p>These examples should match:</p>
  
  <ul>
  <li>9999999999</li>
  <li>9876543210</li>
  </ul>
  
  <p>These examples should not match:</p>
  
  <ul>
  <li>999999999</li>
  <li>1234567890</li>
  <li>8912456789</li>
  <li>qwe3456&amp;ert</li>
  </ul>
  
  <p>It is basically for Indian mobile numbers.</p>
  
  <p>Please provide examples, I have already searched Google and those answers provide over-validation.</p>