Function PI

PI(coefficient?: number): number
Computes the number pi.
Parameters
- Optionalcoefficient: number = 1
  The coefficient to multiply pi with
Returns number
Example
```
const PI = Chalkboard.PI(); // returns 3.1415926535897936
const TAU = Chalkboard.PI(2); // returns 6.283185307179587
```
- Defined in Chalkboard.ts:303