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PHP exp () function

PHP Math Reference PHP Math Reference

Examples

Returns 'e' of different power of:

<?php
echo(exp(0) . "<br>");
echo(exp(1) . "<br>");
echo(exp(10) . "<br>");
echo(exp(4.8));
?>

Running instance »

Definition and Usage

The exp () function returns e to the power of x (e x).

'E' is the natural logarithms (its value is approximately equal to 2.718282), x is the exponent.


grammar

exp( x );

参数 描述
x 必需。规定指数。

technical details

return value: 'e' to the power of x.
Return type: Float
PHP version: 4+


PHP Math Reference PHP Math Reference