# LN2_DBL

> The natural logarithm of 2. Approximately 0.69. This is a f64/double precision constant.

## Definition

* **Type:** Field
* **Namespace:** [Unity.Mathematics](/engine/6000.6/script-reference/unity/mathematics.md)
* **Assembly:** UnityEngine.MathematicsModule

```csharp
public const double LN2_DBL = 0.6931471805599453
```