create button group in bootstrap 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: how to add a button bootstrap

<button class="btn btn-primary">Primary</button>
<a href="#" class="btn btn-secondary">Secondary</button>