# PI

> Get the value of PI used internally by the physics system. Using this will help with determinism.

## Definition

* **Type:** Property
* **Namespace:** [Unity.U2D.Physics](/engine/6000.7/script-reference/unity/u2d/physics.md)
* **Assembly:** UnityEngine.PhysicsCore2DModule

```csharp
public static float PI { get; }
```