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

# momentum

A value, between 0 and 1, the normalization operation uses to update the moving mean and moving variance during training.

## Declaration

```swift
var momentum: Float
```

## See Also

### Inspecting the Properties of a Fused Normalization Parameters Structure

- [type](accelerate/bnns/fusednormalizationparameters/type.md)
- [beta](accelerate/bnns/fusednormalizationparameters/beta.md)
- [gamma](accelerate/bnns/fusednormalizationparameters/gamma.md)
- [epsilon](accelerate/bnns/fusednormalizationparameters/epsilon.md)
- [activation](accelerate/bnns/fusednormalizationparameters/activation.md)