title: String length of bash
body: <p>I have written this to find the length of the string, but it doesn't show the length of the string.</p>
  
  <p>Is there something wrong with what I have written? I'm just a beginner in bash.</p>
  
  <pre><code>Str=abcdefghj
  
  echo "Str is:" `expr length $Str` "characters long"
  </code></pre>