HTML <output> Tag - Playground Example

<!DOCTYPE html><html><body><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></body></html>