title: Ruby access words in string
body: <p>I don't understand the best method to access a certain word by it's number in a string.</p>
  
  <p>I tried using <code>[]</code> to access a word but instead it returns letter.</p>
  
  <pre><code>puts s 
  # =&gt; I went for a walk
  puts s[3]
  # =&gt; w
  </code></pre>