title: OR function in Objective-C
body: <p>is there an OR function in Objective-C?</p>
  
  <p>for example:</p>
  
  <pre><code>if(string1 == string2 || string3 == string 4)
  </code></pre>
  
  <p><code>||</code> doesnt seems to work.</p>
  
  <p>Thanks.</p>