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import math math.pi pi(PHP 4, PHP 5) pi — Get value of pi Description
float pi
( void
)
Returns an approximation of pi. The returned float has a precision based on the precision directive in php.ini, which defaults to 14. Also, you can use the M_PI constant which yields identical results to pi(). Return ValuesThe value of pi as float. Examples
Example #1 pi() example
<?php
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