title: Using VBA to check if below cell is empty
body: <p>How do I use VBA in Excel to check if a below cell is empty or not?
  I want to sum all values in a specific range, but only, if the below cell is not empty.</p>
  
  <p>Is that somehow possible with VBA or any other way?</p>
  
  <p>Example:</p>
  
  <pre><code>4 2 3 2 1
  2   3 1
  </code></pre>
  
  <p>Sum would be: 4 + 3 + 2 = 9.</p>