title: Read and write to console in Windows CMD Batch?
body: <p>How do I read numbers from <strong>STDIN</strong> and print their sum to <strong>STDOUT</strong> in Windows CMD using Batch-script language?</p>
  <p>Like it's working in bash for example:</p>
  <pre><code>read a b; expr $a + $b
  </code></pre>
  <p>Where is a simple way to install Batch language on <a href="https://ubuntu.com/" rel="nofollow noreferrer">Ubuntu</a>? Is this language popular at all, or do pro Windows users install bash?</p>