---
title: particleBirthRate
framework: spritekit
role: symbol
role_heading: Instance Property
path: spritekit/skemitternode/particlebirthrate
---

# particleBirthRate

The rate at which new particles are created.

## Declaration

```swift
var particleBirthRate: CGFloat { get set }
```

## Mentioned in

Creating Particle Effects

## Discussion

Discussion The number of particles generated by the emitter every second. The default value is 0.0.

## See Also

### Controlling When Particles Are Created

- [advanceSimulationTime(_:)](spritekit/skemitternode/advancesimulationtime(_:).md)
- [resetSimulation()](spritekit/skemitternode/resetsimulation().md)
- [numParticlesToEmit](spritekit/skemitternode/numparticlestoemit.md)