Why my dropdown list doesnt show?

	<nav class="navbar navbar-default" role="navigation">
		<div class="container-fluid">
			<a class="navbar-brand" href="index.html">WebDevMentors</a>
		
		<div class="navbar-header navbar-right">
			<ul class="nav navbar-nav">
				<li><a href="index.html">HOME</a></li>
				<li><a href="index.html">ABOUT</a></li>
				<li><a href="index.html">CONTACT</a></li>

				<li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Dropdown <span class="caret"></span></a>
          <ul class="dropdown-menu" role="menu">
            <li><a href="#">Action</a></li>
            <li><a href="#">Another action</a></li>
            <li><a href="#">Something else here</a></li>
            <li class="divider"></li>
            <li><a href="#">Separated link</a></li>
            <li class="divider"></li>
            <li><a href="#">One more separated link</a></li>
          </ul>
        </li>
      
     
			
			</ul>
		</div>
		</div>
	</nav>

<script type="js/jquery"><script>
<script type="js/bootstrap.min.js"><script>