title: ColdFusion isDefined
body: <p>I am trying to check to see if data exist in my form If data does not exist I want to assign it to O. How can I do this.</p>
  
  <pre><code>&lt;cfif not isDefined("FORM.Age")&gt;
   cfset FORM.Age = "0"
  &lt;cfif&gt;
  </code></pre>