how can i use if else in reactjs code example

Example 1: if else react render in jsc

const functionalComponent=()=> {

  return (
    <div>{
  			  props.isFeatured ? (
                        <div className="featured_ovelay_icon">lol</div>

                    ) : ("")
 			}
    </div>
  );
}

Example 2: make a if in jsx

var loginButton;
if (loggedIn) {
  loginButton = <LogoutButton />;
} else {
  loginButton = <LoginButton />;
}

return (
  <nav>
    <Home />
    {loginButton}
  </nav>
);