title: How to store the result of a command expression in a variable using bat scripts?
body: <p>I have the command below to count all directories that that follow the pattern <code>20??????</code> :</p>
  
  <pre><code>'dir /b "20??????" | find /c "2"'
  </code></pre>
  
  <p>For example, if I have the following directories, the command would return 6:</p>
  
  <pre><code>20090901
  20090902
  20090903
  20090904
  20090905
  20090906
  </code></pre>
  
  <p>How can I store the result of this command (6 in the forementioned example) in a variable?</p>