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<deg2radexpm1>
^Math FunctionsLast updated: Mon, 26 Oct 2026

exp

(PHP 4, PHP 5, PHP 7, PHP 8)

exp — Calculates the exponent of e

Description

function exp(float $num): float

Returns e raised to the power of num.

Note:

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

Parameters

num

The argument to process

Return Values

'e' raised to the power of num

Examples

Example #1 exp() example

<?php
echo exp(12), PHP_EOL;
echo exp(5.7);
?>

The above example will output:

162754.791419
298.86740096706

See Also

  • log() - Natural logarithm
  • pow() - Exponential expression


<deg2radexpm1>
^Math FunctionsLast updated: Mon, 26 Oct 2026