atanh()

The atanh() calculates the inverse hyperbolic tangent of a given number and returns a float.

Syntax

atanh($inputValue)

• The function atanh() only takes one parameter, $inputValue, and returns a floating point number. The passed value must be a numerical value between -1 and 1 (not inclusive).

Example

The example below demonstrates a basic implementation of atanh().

<?php
  echo (atanh(0.5));
?>

The result will be:

0.54930614433405

Codebyte Example

The example below is runnable and demonstrates how to use the function atanh() with a variable, to store and display the result.

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