title: What does the colon do in PATH
body: <p>I am new to bash, and I saw people often add <code>:</code> after a directory when modifying <code>PATH</code>. After searching for a while, I did not find an answer for that, or I believe I did not search it correctly. So I hope I could get an answer here.</p>
  
  <p>Example:</p>
  
  <pre><code>/Users/chengluli/anaconda/bin:/Users/chengluli/.rbenv/shims:/
  </code></pre>
  
  <p>What does the <code>:</code> after <code>bin</code> and <code>shims</code> do?</p>