title: Flutter/Dart - Difference between () {} and () => {}
body: <p>In Flutter/Dart the examples sometimes show fat arrow and sometimes dont.  Here are examples:</p>
  
  <pre><code>RaisedButton(
    onPressed: () {
      setState(() {
        _myTxt = "Text Changed";
      });
    },
  </code></pre>
  
  <p>Elsewhere you see:</p>
  
  <pre><code>void main() =&gt; runApp(MyApp());
  </code></pre>