PHP 手冊
前一頁 |  | 下一頁

# exp

(PHP 3, PHP 4 , PHP 5)

exp -- Calculates the exponent of `e` (the Neperian or Natural logarithm base)

## Description

float exp ( float arg )

Returns `e` raised to the power of arg.

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

範例 1. exp() example

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

The above example will output:

    1.6275E+005
    298.87

See also log() and pow().

前一頁 | 內容 | 下一頁
deg2rad | 上一層 | expm1