title: advanced cfif statement
body: <p>How would I create this statement in CF?</p>
  
  <pre><code>&lt;cfif (not isdefined("URL.room") or #URL.room# EQ "")
        and (not isdefined("URL.system" or #URL.system# EQ "")
        and (not isdefined("URL.date") or #URL.date# EQ "")&gt;
  </code></pre>
  
  <p>Obviously the parentheses don't work, but illustrate what I am trying to accomplish. What is the syntax for this?</p>
  
  <p><strong>EDIT:</strong>
  Ok, I understand how to use EQ and all that. I posted this in a bit of a hurry. My question is about the parentheses. Is it syntactically correct to use them this way?</p>