title: How to find the Retain count?
body: <p>Please explain me the below code of lines, I am just confused..,</p>
  
  <pre><code>Nsstring *a;
  Nsstring *b;
  
  a = [b retain];
  </code></pre>
  
  <p>what is the retain count of a &amp; b.</p>
  
  <pre><code>a = [b copy];
  </code></pre>
  
  <p>what is the retain count of a &amp; b.</p>
  
  <p>Thanks in advance.</p>