php man page for exp

EXP(3)									 1								    EXP(3)

exp - Calculates the exponent of e

SYNOPSIS
       float exp (float  $arg)

DESCRIPTION
	Returns e raised to the power of $arg.

       Note

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

PARAMETERS
	      o $arg
		- The argument to process

RETURN VALUES
	'e' raised to the power of $arg

EXAMPLES
       Example #1

	      exp(3) example

	      <?php
	      echo exp(12) . "
";
	      echo exp(5.7);
	      ?>

	      The above example will output:

	      1.6275E+005
	      298.87

SEE ALSO
       log(3), pow(3).

PHP Documentation Group 														    EXP(3)