PHP Functions Essential Reference

exp

float exp(float power) 

Calculates the value of e raised to the power of power.

Returns:

e to the power of a number

Description:

Returns e (the natural logarithm base constant, 2.718282...) raised to the power of power . exp() is the opposite of the log() function.

Version:

PHP 3, PHP 4

See also:

log() 

Example:

Raise e to a given power

$power = 4; echo "e to the $power is ", exp($powr), "\n";