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<!DOCTYPE html>
<html>
<body>
​
<p>The Number.isFinite() function returns true if the value is  a finite, legal number.</p>
​
<p>Click the button to check whether the values are finite numbers.</p>
​
<button onclick="myFunction()">Try it</button>
​
<p id="demo"></p>
​
<p><strong>Note:</strong> The Number.isFinite() function is not supported in IE 11 (and earlier versions).</p>
​
<script>
function myFunction() {
  var res = "";
  res = res + Number.isFinite(123) + ": 123<br>";
  res = res + Number.isFinite(-1.23) + ": -1.23<br>";
  res = res + Number.isFinite(5-2) + ": 5-2<br>";
  res = res + Number.isFinite(0) + ": 0<br>";
  res = res + Number.isFinite('123') + ": '123'<br>";
  res = res + Number.isFinite('Hello') + ": 'Hello'<br>";
  res = res + Number.isFinite('2005/12/12') + ": '2005/12/12'<br>";
  res = res + Number.isFinite(Infinity) + ": Infinity<br>";
  res = res + Number.isFinite(-Infinity) + ": -Infinity<br>";
  res = res + Number.isFinite(0 / 0) + ": 0 / 0<br>";
​
  document.getElementById("demo").innerHTML = res;
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_isfinite_number by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 05 Jun 2019 14:02:25 GMT -->
</html>
​
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