How to use is nan in PHP
This article describe about is_nan() function in PHP.
is_nan() function
If define value is "not a number" then is_nan() function return true otherwise it returns nothing.
Syntax
| Parameter |
Description |
| x |
Specified value for check. |
Example
<html>
<body>
<?php
echo is_nan(200) . "<br />";
echo is_nan(acos(1.01));
?>
</body>
</html> |
Output
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