title: Regular expression for numbers without leading zeros
body: <p>I need a regular expression to match any number from 0 to 99. Leading zeros may not be included, this means that f.ex. 05 is not allowed.</p>
  
  <p>I know how to match 1-99, but do not get the 0 included.</p>
  
  <p>My regular expression for 1-99 is</p>
  
  <pre><code>^[1-9][0-9]?$
  </code></pre>