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pi

(PHP 4, PHP 5, PHP 7, PHP 8)

pi Guet value of pi

Description

pi (): float

Returns an approximation of pi. Also, you can use the M_PI constant which yields identical resuls to pi() .

Parameters

This function has no parameters.

Return Values

The value of pi as float.

Examples

Example #1 pi() example

<?php
echo pi (), PHP_EOL ; // 3.1415926535898
echo M_PI , PHP_EOL ; // 3.1415926535898
?>

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