Number functions

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<html>
<body>

<h2>JavaScript Number Methods</h2>

<p>The isFinite() method returns false if the argument is Infinity or NaN.</p>
<p>Otherwise it returns true.</p>

<p id="demo"></p>

<script>
document.getElementById("demo").innerHTML =
isFinite(10 / 0) + "<br>" + isFinite(10 / 1);
</script>

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</html>

JavaScript Number Methods

The isFinite() method returns false if the argument is Infinity or NaN.

Otherwise it returns true.