Guys, i have been tryng to Apply the Default Bootstrap Button Style but to no avail

Tell us what’s happening:

Your code so far

<div class="container-fluid">
  <h3 class="text-primary text-center">jQuery Playground</h3>
  <div class="row">
    <div class="col-xs-6">
      <div class="well">
        <button class="btn" "btn-default"></button>
        <button class="btn" "btn-default"></button>
        <button class="btn" "btn-default"></button>
      </div>
    </div>
    <div class="col-xs-6">
      <div class="well">
        <button class="btn" "btn-default"></button>
        <button class="btn" "btn-default"></button>
        <button class="btn" "btn-default"></button>
      </div>
    </div>
  </div>
</div>

Your browser information:

Your Browser User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0.

Link to the challenge:
https://www.freecodecamp.org/challenges/apply-the-default-bootstrap-button-style

When applying more than one class to an element, the different classes should be all in one string separated by a space. Not:

<button class="btn" "btn-default"></button>

but

<button class="btn btn-default"></button>

with what you wrote, they were only getting class btn and btn-default was doing nothing.