JavaScript Number.isFinite() Method
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JavaScript Number.isFinite() Method
The Number.isFinite()
method returns a Boolean value indicates whether the passed value is a finite number.
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<script>
var result = Number.isFinite(55/0);
document.write(result);
</script>
</body>
</html>
Syntax
Number.isFinite(value)
Parameter Values
Value | Type | Explanation |
---|---|---|
value | Required | The value to be tested for being finite. |
Return Value
Value | Explanation |
---|---|
true | If the given value is finite. |
false | If the given value is infinite. |
More Examples
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<script>
document.write(Number.isFinite(25) +": 25 <br>");
document.write(Number.isFinite(0) +": 0<br>");
document.write(Number.isFinite(2e64) +": 2e64 <br>");
document.write(Number.isFinite(4 - 2) +": 4 - 2<br><br>");
document.write(Number.isFinite('65') +": '65'<br>");
document.write(Number.isFinite(55 / 0) +": 55 / 0<br>");
document.write(Number.isFinite(Infinity) +": Infinity<br>");
document.write(Number.isFinite(-Infinity) +": -Infinity<br>");
document.write(Number.isFinite(null) +": null<br>");
</script>
</body>
</html>
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