title: How to echo a environment variable contains a '&' in DOS batch?
body: <p>When I type:</p>
  
  <pre><code>set hi=Hello^&amp;World!
  echo %hi%
  </code></pre>
  
  <p>it print Hello and tell me World is not a command</p>
  
  <p>I want it prints Hello&amp;World!</p>
  
  <p>How to do this?</p>