(PHP 4, PHP 5, PHP 7, PHP 8)
pi — Get value of pi
Returns an approximation of pi.
Also, you can use the M_PI
constant which yields
identical results to pi().
This function has no parameters.
The value of pi as float.
Example #1 pi() example
<?phpecho pi(); // 3.1415926535898echo M_PI; // 3.1415926535898?>