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PHP exp() Function

< PHP Math Reference

Example

Return 'e' raised to the power of different numbers:

<?php
echo(exp(0) . "<br>");
echo(exp(1) . "<br>");
echo(exp(10) . "<br>");
echo(exp(4.8));
?>

Definition and Usage

The exp() function returns e raised to the power of x (e^x).

'e' is the base of the natural system of logarithms (approximately 2.718282) and x is the number passed to it.

Syntax

exp(x);

Parameter	Description
x	Required. Specifies the exponent

Technical Details

Return Value:	'e' raised to the power of x
Return Type:	Float
PHP Version:	4+

< PHP Math Reference