title: How to define Empty Char in Delphi
body: <p>Just for curiosity,</p>
  
  <p>Why in Delphi, if we defined an empty char by:</p>
  
  <pre><code>a:Char;
  a:='';
  </code></pre>
  
  <p>we get an error: <strong>Incompatible types: 'Char' and 'string'</strong></p>
  
  <p>However, if we placed </p>
  
  <pre><code>a:='a';
  </code></pre>
  
  <p>it will be fine?</p>
  
  <p>Is it necessary to define an empty char by: <code>a:=#0</code>?</p>