Etiqueta vazia html
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<label for=""></label>
<!--Text--->
<label for="">Smaple Text</label>
Stormy Shark
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<label for=""></label>
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<label for="">Smaple Text</label><body>
<section>
<h1>Calculator</h1>
<label class="sum">Sum:</label>
<input type="text" id="sum" disabled="disabled">
<br>
<label>First Number:</label>
<input type="text" id="firstNumber">
<br>
<label>Second Number:</label>
<input type="text" id="secondNumber">
<br>
<div>
<input type="button" id="calc" value="Calculate">
<input type="button" id="clear" value="Clear">
</div>
</section>
</body>