7 buttons in one line bootstrap code example

Example 1: bootstrap button group

<div class="btn-toolbar" role="toolbar" aria-label="Toolbar with button groups">
  <div class="btn-group mr-2" role="group" aria-label="First group">
    <button type="button" class="btn btn-secondary">1</button>
    <button type="button" class="btn btn-secondary">2</button>
    <button type="button" class="btn btn-secondary">3</button>
    <button type="button" class="btn btn-secondary">4</button>
  </div>
  <div class="btn-group mr-2" role="group" aria-label="Second group">
    <button type="button" class="btn btn-secondary">5</button>
    <button type="button" class="btn btn-secondary">6</button>
    <button type="button" class="btn btn-secondary">7</button>
  </div>
  <div class="btn-group" role="group" aria-label="Third group">
    <button type="button" class="btn btn-secondary">8</button>
  </div>
</div>

Example 2: bootstrap put button on one line

<div class="container">
  <div class="row">
    <div class="col-12 col-md-6">
       <form>
        <button class="btn btn-primary btn-lg" type="submit" formaction="1klasse.html">1.klasse </button>
       </form>
    </div>
    <div class="col-12 col-md-6">
      <form>
        <button class="btn btn-primary btn-lg" type="submit" formaction="1klasse.html">1.klasse </button>
       </form>
    </div>
  </div>
</div>