is_nan() function in PHP

The is_nan() function checks for ‘not a number’ value. It Returns TRUE if num is 'not a number', else FALSE is Returned.

Syntax

is_nan(num)

Parameters

• num − The value to check

Return

The is_nan() function Returns TRUE if num is 'not a number', else FALSE is Returned.

Example

<?php
   echo is_nan(10)
?>

Let us see another example −

Example

<?php
   echo is_nan(acos(1));
?>

karthikeya Boyini

I love programming (: That's all I know

Updated on: 26-Jun-2020

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