select in w3school code example

Example 1: select html

<select class="form-control">
  <option>1</option>
  <option>2</option>
  <option>3</option>
  <option>4</option>
  <option>5</option>
</select>

Example 2: html select

<label for="cars">Choose a car:</label>
<select name="cars" id="cars">
  <optgroup label="Swedish Cars">
    <option value="volvo">Volvo</option>
    <option value="saab">Saab</option>
    <option value="n/a" disabled>unavailable</option>
  </optgroup>
  <optgroup label="German Cars">
    <option value="mercedes" selected>Mercedes</option>
    <option value="audi">Audi</option>
  </optgroup>
</select>

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Html Example