---
title: activation
framework: accelerate
role: symbol
role_heading: Instance Property
path: accelerate/bnnsfullyconnectedlayerparameters/activation
---

# activation

The layer activation function.

## Declaration

```swift
var activation: BNNSActivation
```

## See Also

### Instance Properties

- [bias](accelerate/bnnsfullyconnectedlayerparameters/bias.md)
- [in_size](accelerate/bnnsfullyconnectedlayerparameters/in_size.md)
- [out_size](accelerate/bnnsfullyconnectedlayerparameters/out_size.md)
- [weights](accelerate/bnnsfullyconnectedlayerparameters/weights.md)