## PI Constant Pi

Section: Base Constants

### Usage

Returns a`double`

(64-bit floating point number) value that represents pi (ratio between the circumference and diameter of a circle...). Typical usage
y = pi

This value is approximately 3.141592653589793.

### Example

The following example demonstrates the use of the`pi`

function.
--> pi ans = 3.1416 --> cos(pi) ans = -1