title: Padding Zeros in XSLT
body: <p>Is there any function that pads zeros on the left?</p>
  
  <p>The requirements of what I'm trying to do are:</p>
  
  <ul>
  <li>We don't know the coming input string length. </li>
  <li>If it is less than 20 we have to pad zeros on the left side.</li>
  <li>If the input string length is 10 then we have to pad 10 zeros in the left side.</li>
  </ul>
  
  <h2>Example</h2>
  
  <p>Input:</p>
  
  <blockquote>
    <p>1234567899</p>
  </blockquote>
  
  <p>Output:</p>
  
  <blockquote>
    <p>00000000001234567899</p>
  </blockquote>