exp()

exp() — Calculates the exponent of e.

Built-in function of PHP 8.5. The manual lists it as available in PHP 4, PHP 5, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.

What it does

'e' is the base of the natural system of logarithms, or approximately 2.718282.

Signature

exp(float $num): float

Parameters

Return value

'e' raised to the power of num

Example

A runnable snippet:

echo exp(12), PHP_EOL; echo exp(5.7);

Output:

162754.791419 298.86740096706

See also

log(), pow()

All PHP 8.5 built-in functions

Reference card built from the PHP manual page exp() (PHP documentation, CC BY 3.0). The page is generated from the manual, so the wording of the parameter and return value text follows php.net.