Answers for "bootstrap inline button with text"

bootstrap force button to be inline with input

<div class="input-group">
   <input type="text" class="form-control">
   <span class="input-group-btn">
        <button class="btn btn-default" type="button">Go!</button>
   </span>
</div>

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>