# PI_DBL

> The mathematical constant pi. Approximately 3.14. This is a f64/double precision constant.

## Definition

* **Type:** Field
* **Namespace:** [Unity.Mathematics](/engine/6000.7/script-reference/unity/mathematics.md)
* **Assembly:** UnityEngine.MathematicsModule

```csharp
public const double PI_DBL = 3.141592653589793
```