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HTML Code

<!DOCTYPE html>
<html>
<head>
  <style>#point::after{content:"\21C6"}</style>
</head>
<body>
  <h1>Left Arrow Over Right Arrow (U+21C6)</h1>
  <p>Hex: &#x21C6;</p>
  <p>Decimal: &#8646;</p>
  <p>Named: &lrarr;</p>
  <p id=point>CSS: </p>
  <p><a href=#>&lrarr; Swap</a></p>
</body>
</html>

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HTML Entity for Left Arrow Over Right Arrow (U+21C6)