---
title: momentum
framework: accelerate
role: symbol
role_heading: Instance Property
path: accelerate/bnnsoptimizersgdmomentumfields/momentum
---

# momentum

The rate of momentum decay.

## Declaration

```swift
var momentum: Float
```

## See Also

### Instance Properties

- [learning_rate](accelerate/bnnsoptimizersgdmomentumfields/learning_rate.md)
- [gradient_scale](accelerate/bnnsoptimizersgdmomentumfields/gradient_scale.md)
- [regularization_scale](accelerate/bnnsoptimizersgdmomentumfields/regularization_scale.md)
- [clip_gradients](accelerate/bnnsoptimizersgdmomentumfields/clip_gradients.md)
- [clip_gradients_min](accelerate/bnnsoptimizersgdmomentumfields/clip_gradients_min.md)
- [clip_gradients_max](accelerate/bnnsoptimizersgdmomentumfields/clip_gradients_max.md)
- [nesterov](accelerate/bnnsoptimizersgdmomentumfields/nesterov.md)
- [regularization_func](accelerate/bnnsoptimizersgdmomentumfields/regularization_func.md)
- [sgd_momentum_variant](accelerate/bnnsoptimizersgdmomentumfields/sgd_momentum_variant.md)