title: Why for-in loop doesn't print what I want?
body: <p>I wrote in the terminal:</p>
  
  <pre><code>arr=(1 2 3)
  for x in $arr; do
   echo $x
  done
  </code></pre>
  
  <p>and it just prints '1'.
  Why doesn't it print 1 2 3 ?</p>