PHP expm1() Function
Example
Return exp() - 1:
<?php
echo(expm1(0) . "<br>");
echo(expm1(1) . "<br>");
echo(expm1(10) . "<br>");
echo(expm1(4.8));
?>
Run example »
Definition and Usage
The expm1() function returns exp(x) - 1.
Syntax
expm1(x);
| Parameter | Description |
|---|---|
| x | Required. Specifies the exponent |
Technical Details
| Return Value: | 'e' raised to the power of x minus 1 |
|---|---|
| Return Type: | Float |
| PHP Version: | 4.1+ |
| PHP Changelog: | PHP 5.3: expm1() now available on all platforms |
PHP Math Reference
