for 속성이 있는 html 요소

<label for="element_id">

<form action="/jc_script/action.php">
  <label for="php">PHP</label>
  <input type="radio" name="lang" id="php" value="php"><br>
  <label for="java">Java</label>
  <input type="radio" name="lang" id="java" value="java"><br>
  <label for="python">Python</label>
  <input type="radio" name="lang" id="python" value="python"><br><br>
  <input type="submit" value="提交">
</form>

<output for="element_id">

<form oninput="x.value=parseInt(a.value)+parseInt(b.value)">0
<input type="range" id="a" value="50">100
+<input type="number" id="b" value="50">
=<output name="x" for="a b"></output>
</form>