pi() function in PHP

Thispi()The function returns the value of Pi (π).

Syntax

pi()

Parameter

• Not applicable

Returns

Thispi()The function returns an approximate value of PI. This value is a floating-point number.

3.1415926535898

Example

<?php
　　　echo(pi());
?>

Output Result

3.1415926535898

Example

Let's look at another example to get the value of PI

<?php
　　　echo M_PI;
?>

Output Result

3.1415926535898