PHP: is_nan function
Description
The is_nan() function is used to find whether a value is not a number.
Version
(PHP 4 and above)
Syntax:
is_nan (num)
Parameter:
Name | Description | Required / Optional |
Type |
---|---|---|---|
num | The value to be checked. | Required | Float |
Return value:
TRUE if val is not a number otherwise FALSE.
Value Type : Boolean.
Pictorial Presentation:
Example:
Output:
10.21 is is_nan : NAN is is_nan : 1 500 is is_nan :
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See also
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