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<!DOCTYPE html>
<html>
<body>
​
<h2>JavaScript Numbers</h2>
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<p>You can use the global JavaScript function isNaN() to find out if a value is a number:</p>
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<p id="demo"></p>
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<script>
var x = 100 / "Apple";
document.getElementById("demo").innerHTML = isNaN(x);
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_numbers_isnan_true by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:28:13 GMT -->
</html>
​
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