title: Regex Pattern to check only letters
body: <p>I need to check whether string is only contain letters but not numbers or special characters.I used below regex pattern,</p>
  
  <pre><code>String validText = "^[a-zA-Z-]+$";
  </code></pre>
  
  <p>its work fine for 'Leo#' but if it is like 'Leo#1' its not working properly.</p>
  
  <p>Anyone have idea ?</p>