title: how to match all special characters except a comma
body: <p>What's the regex values for to match a string against all special characters and letters except a comma. </p>
  
  <pre><code>value = "23,$%aA";
  </code></pre>
  
  <p>I want to do a match if the value has any pf the special characters and letters like the above string then it will return true but if it just has a value like </p>
  
  <p><code>value = "23,3456.00"</code> </p>
  
  <p>then it will return false. As all the special characters and letters are no longer part of the string. </p>
  
  <p>Can I do this using match and regex. </p>