# aliveTimePercent

> Specifies how long each particle has been alive.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.ParticleSystemJobs](/engine/6000.6/script-reference/unityengine/particlesystemjobs.md)
* **Assembly:** UnityEngine.ParticleSystemModule

```csharp
public readonly NativeArray<float> aliveTimePercent { get; }
```

### Remarks

The value is a value between 0 and 100, where 0 means the particle has just been born, and 100 means it is at the end of its lifetime.