The JavaScript isFinite() function is used to check whether a number is a finite, legal number or not. It returns true for all the values except +infinity, -infinity, or NaN.
Syntax:
isFinite(value)
Parameters: This method takes a single parameter as mentioned above and discussed below:
- value: It is a required value passed in the isFinite() function.
Return Value: It returns a Boolean value i.e. returns false if the value is +infinity, -infinity, or NaN, otherwise returns true.
Example: In this example, we will check for some numbers if they are finite or not using the isFinite() function of javascript.
Javascript
<script> console.log(isFinite(12)); console.log(isFinite(0)); console.log(isFinite(12.3)); console.log(isFinite("Geeks")); console.log(isFinite("456")); console.log(isFinite(-46)); </script> |
Output:
true true true false true true
We have a complete list of Javascript Functions, to check those please go through this Javascript Function Complete reference article.
Supported Browsers:
- Chrome 1 and above
- Firefox 1 and above
- Edge 12 and above
- Opera 3 and above
- Safari 1 and above
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