title: Objective-C, why do I need to put this asterix here but not here
body: <p>My question is pretty simple, why do I need to put an asterix for NSString but not for NSInteger ? </p>
  
  <pre><code>    NSString *myString = [NSString stringWithFormat:@"Hello, world !"];
      NSInteger myInteger = 42;
  </code></pre>