html nav

<nav>
   <a href="/html/">HTML</a> |
  <a href="/css/">CSS</a> |
  <a href="/js/">JavaScript</a> |
  <a href="/python/">Python</a>
 </nav>

<nav>Navigation bar content</nav>

<ul>

 
<li><a href="default.asp">Home</a></li>

 
<li><a href="news.asp">News</a></li>

 
<li><a href="contact.asp">Contact</a></li>

 
<li><a href="about.asp">About</a></li>

</ul>
 

    <nav>

   <a href="/html/">HTML</a> |

  <a href="/css/">CSS</a> |

  <a href="/js/">JavaScript</a> |

  <a href="/jquery/">jQuery</a>

 </nav>
 

Uses HTML's anchors:
<a href="#anch_start">INTRO</a>
<a href="#anch_end">ENDING</a>

'href' uses 'id' to find these segments:
<div class="intro"  id="anch_start"></div> 
<div class="epic_ending"  id="anch_end"></div>

  <div id="myDIV">
  <button class="btn">1</button>
  <button 
  class="btn active">2</button>
  <button class="btn">3</button>
  
  <button class="btn">4</button>
  <button class="btn">5</button>

  </div>