HTML Code

<!DOCTYPE html>
<html>
<head>
  <style>
    #point::after {
      content: "\2070";
    }
  </style>
</head>
<body>
  <h1>Superscript Zero (⁰) in HTML</h1>
  <p>Superscript Zero using Hex Code: &#x2070;</p>
  <p>Superscript Zero using HTML Code: &#8304;</p>
  <p id="point">Superscript Zero using CSS Entity: </p>
  <p>Semantic alternative: x<sup>0</sup></p>
</body>
</html>

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HTML Entity for Superscript Zero (⁰)