how to use the textarea in bootstrap code example

Example 1: html bootstrap textarea

<div class="form-group">
  <label for="exampleFormControlTextarea3">Rounded corners</label>
  <textarea class="form-control" id="exampleFormControlTextarea3" rows="7"></textarea>
</div>

Example 2: bootstrap form textarea

<div class="form-group">
    <label for="exampleFormControlTextarea1">Example textarea</label>
    <textarea class="form-control" id="exampleFormControlTextarea1" rows="3"></textarea>
</div>