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数学 | Mathematics

exp

exp

(PHP 4, PHP 5, PHP 7)

exp — Calculates the exponent of e

Description

float exp ( float $arg )

Returns e raised to the power of arg.

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

Parameters

arg

The argument to process

Return Values

'e' raised to the power of arg

Examples

Example #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() - Natural logarithm

  • pow() - Exponential expression

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https://secure.php.net/manual/en/function.exp.php