Check whether a number is a finite, legal number:
The result of res will be:
The isFinite() function determines whether a number is a finite, legal number.
This function returns false if the value is +infinity, -infinity, or NaN (Not-a-Number), otherwise it returns true.
Function | |||||
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isFinite() | Yes | Yes | Yes | Yes | Yes |
Parameter | Description |
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value | Required. The value to be tested |
Return Value: | A Boolean. Returns false if the value is +infinity, -infinity, or NaN, otherwise it returns true. |
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JavaScript Version: | 1.3 |