Bootstrap Setup using CDN

index.html

@@ -4,6 +4,11 @@
     <title>The Best Currency Exchange website ever</title>
     <meta charset="UTF-8">
     <meta name="description" content="Currency Exchange Website">
+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+    <!-- Imported Bootstrap4 using CDN -->
+    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous"> 
+    
+
     <link rel= "stylesheet" href="main.css"> <!--Not to be used yet-->
 
 </head>
@@ -40,7 +45,10 @@
         </div>
     </header>
     <!-- Header section end -->
-
+    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
+    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
+    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
     </body>
 </html>