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<!DOCTYPE html>
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<title>My Example</title>
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<p id="msg"></p>
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<p><code>Math.PI</code> is a static property that represents the ratio of the circumference of a circle to its diameter. Therefore the result will always the same number, regardless of the circle's size.</p>
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<script>
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  document.getElementById("msg").innerHTML = Math.PI;
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</script>