title: NSUserDefault , Alloc init vs standard Userdefault
body: <p>i am confused  that what is difference between </p>
  
  <p><code>NSUserDefaults *userDefault = [NSUserDefaults standardUserDefaults];
  </code></p>
  
  <p>and</p>
  
  <p><code>NSUserDefaults *userDefault = [[NSUserDefaults alloc] init];
  </code></p>
  
  <p>can any one can help me......</p>
  
  <p>thnx in advance </p>