title: How to append a string in Ruby
body: <p>I am trying to simply add a '/' at the end of this string. What is the best way to do this?</p>
  
  <pre><code>&gt;&gt; params[:id]
  "shirts"
  </code></pre>
  
  <p>I would like to make <code>params[:id] == "shirts/"</code> . How do I add a <code>/</code> at the end of that string?</p>