在Bootstrap中使用float-*-right类将元素向右浮动。不同的屏幕尺寸包括将浮动尺寸设置为小，中，大和特大尺寸。
让我们看看如何在中小尺寸屏幕尺寸上浮动和向右移动元素-
<div class="float-sm-right"> This text is on the right (on small screen). </div>
<div class="float-md-right"> This text is on the right (on medium screen). </div>
让我们看看如何在不同屏幕的右侧放置元素-
<!DOCTYPE html> <html lang="en"> <head> <title>Bootstrap Example</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/3.3.1/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script> </head> <body> <div class="container"> <h2>Example</h2> <div class="clearfix"> <div class="float-sm-right">This text is on the right (on small screen).</div><br> <div class="float-md-right">This text is on the right (on medium screen).</div><br> <div class="float-lg-right">This text is on the right (on large screen).</div><br> <div class="float-xl-right">This text is on the right (on extra large screen).</div><br> </div> </div> </body> </html>