# back

> The unit vector in the negative z direction

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.CoreModule

```csharp
public static Vector3Int back { get; }
```

### Remarks

This property is equivalent to writing `Vector3Int(0, 0, -1)`.