HTML Code

<!DOCTYPE html>
<html>
<head>
  <style>
    #point::after {
      content: "\2080";
    }
  </style>
</head>
<body>
  <h1>Subscript Zero (₀) in HTML</h1>
  <p>Subscript Zero using Hex Code: &#x2080;</p>
  <p>Subscript Zero using HTML Code: &#8320;</p>
  <p id="point">Subscript Zero using CSS Entity: </p>
  <p>Semantic alternative: x<sub>0</sub></p>
</body>
</html>

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HTML Entity for Subscript Zero (₀)