PHP - exp

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Metóda - exp

(PHP 4, PHP 5, PHP 7)

This function returns the base of natural logarithm - Euler's number raised to the power of a given argument (e^x).

It is equivalent to pow(M_E, x).

Procedurálne

• function exp (float $arg) : float

Parametre

Názov	Dátový typ	Predvolená hodnota	Popis
$arg	float		The Euler's number exponent.

Mávratovej hodnoty

Vracia: float

The raised Euler's number returned as a float.

Príklady

<?php
for ($i = 0; $i <= 10; $i++)
    echo ("exp $i = " . exp($i) . "<br>");

This example outputs (if viewed from a web browser):

exp 0 = 1
exp 1 = 2.718281828459
exp 2 = 7.3890560989307
exp 3 = 20.085536923188
exp 4 = 54.598150033144
exp 5 = 148.41315910258
exp 6 = 403.42879349274
exp 7 = 1096.6331584285
exp 8 = 2980.9579870417
exp 9 = 8103.0839275754
exp 10 = 22026.465794807