text: import React from 'react'
  
  function TopNav() {
      return(
          <div className="top_nav">
              <div className="nav_menu">
                  <div className="nav toggle">
                      <a id="menu_toggle"><i className="fa fa-bars"></i></a>
                  </div>
                  <nav className="nav navbar-nav">
                      <ul className=" navbar-right">
                          <li role="presentation" className="nav-item dropdown open">
                              <a href="http://prime-numbers-api.com/" target="_blank" rel="noreferrer" >
                                  <i className="fa fa-is-this-number-prime"></i> Prime-Numbers-API.com
                              </a>
                          </li>
                      </ul>
                  </nav>
              </div>
          </div>
  
      )
  }
  
  export default TopNav