title: Regular Expression in Find command
body: <p>I want to list out the files which starts with a number and ends with ".c" extension. The following is the find command which is used. But, it does not give
  the expected output.</p>
  
  <p>Command:    </p>
  
  <pre><code>find -type f -regex "^[0-9].*\\.c$"
  </code></pre>