The expm function in PHP1Function ()

expm1) function returns e raised to the power of x-1, that is

ex　-1

Syntax

expm1(val)

parameter

• val-This is power

returns

expm1) function returns e raised to the power of x-1

Example

<?php
　　　echo(expm1(0) . "<br>";
　　　echo(expm1(1));
?>

Output Result

0<br>1.718281828459

Let's look at another example-

Example

<?php
　　　$val =　1;
　　　echo "e^", $val, ""-1　= "", expm1($val);
?>

Output Result

e^1-1　=　1.718281828459