title: Initialize the empty string in ObjectC?
body: <p>Someone use the following to initialize the NSstring</p>
  
  <pre><code>NSString *astring = [[NSString alloc] init];
  </code></pre>
  
  <p>I am wondering why not just use </p>
  
  <pre><code>NSString *atring = nil or NSString *astring = @""
  </code></pre>