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<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Global Methods</h2>
<p>The Number() method converts variables to numbers:</p>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = 
  Number(true) + "<br>" +
  Number(false) + "<br>" +
  Number("10") + "<br>" + 
  Number("  10") + "<br>" +
  Number("10  ") + "<br>" +
  Number(" 10  ") + "<br>" +
  Number("10.33") + "<br>" + 
  Number("10,33") + "<br>" +
  Number("10 33") + "<br>" +
  Number("John");
</script>
</body>
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</html>