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PHP Tutorial

PHP: tanh() function

Description

The tanh() function returns the hyperbolic tangent of a number.

Version:

(PHP 4 and above)

Syntax:

tanh(num)

Parameter:

Name Description Required /
Optional
Type
num A number. Required Float

Return value:

The hyperbolic tangent of num.

Value Type: Float.

Example:

<?php
$val1= 0;
$val2=5;
$val3=-10;
$val4= M_PI_4;
$ztanh1=tanh($val1);
$ztanh2=tanh($val2);
$ztanh3=tanh($val3);
$ztanh4=tanh($val4);
echo "Hyperbolic tangent of $ztanh1 is $ztanh1<br />";
echo "Hyperbolic tangent of $ztanh2 is $ztanh2<br />";
echo "Hyperbolic tangent of $ztanh3 is $ztanh3<br />";
echo "Hyperbolic tangent of $ztanh4 is $ztanh4<br />";
?> 

Output:

Hyperbolic tangent of 0 is 0
Hyperbolic tangent of 0.9999092042626 is   0.9999092042626
Hyperbolic tangent of -0.99999999587769 is   -0.99999999587769
Hyperbolic tangent of  is 

View the example in the browser

See also

PHP Function Reference

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