title: Count cells that contain any text
body: <p>I want to count the cells that contain anything within a range.
  Any cell that contain text, or numbers or something else should do a plus one in my result-cell.</p>
  
  <p>I found this function,</p>
  
  <pre><code>countif(range; criteria)
  </code></pre>
  
  <p>but this doesn't work for me, because I don't know what to type in the criteria. How can I do this?</p>