add button group in bootstrap 3 code example

Example 1: bootstrap button group

<div class="btn-group">
  <button type="button" class="btn btn-success">Add</button>
  <button type="button" class="btn btn-warning">Update</button>
  <button type="button" class="btn btn-danger">Delete</button>
</div>

Example 2: button group bootstrap

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
  
  
  <div class="btn-group-vertical">
    <button type="button" class="btn btn-primary">Apple</button>
    <button type="button" class="btn btn-primary">Samsung</button>
    <button type="button" class="btn btn-primary">Sony</button>
  </div>