---
title: BNNS.ActivationFunction
framework: accelerate
role: symbol
role_heading: Enumeration
path: accelerate/bnns/activationfunction
---

# BNNS.ActivationFunction

Constants that describe activation functions.

## Declaration

```swift
enum ActivationFunction
```

## Topics

### Activation Functions

- [BNNS.ActivationFunction.abs](accelerate/bnns/activationfunction/abs.md)
- [BNNS.ActivationFunction.celu(alpha:)](accelerate/bnns/activationfunction/celu(alpha:).md)
- [BNNS.ActivationFunction.clamp(bounds:)](accelerate/bnns/activationfunction/clamp(bounds:).md)
- [BNNS.ActivationFunction.clampedLeakyRectifiedLinear(alpha:beta:)](accelerate/bnns/activationfunction/clampedleakyrectifiedlinear(alpha:beta:).md)
- [BNNS.ActivationFunction.elu(alpha:)](accelerate/bnns/activationfunction/elu(alpha:).md)
- [BNNS.ActivationFunction.geluApproximation(alpha:beta:)](accelerate/bnns/activationfunction/geluapproximation(alpha:beta:).md)
- [BNNS.ActivationFunction.geluApproximation2(alpha:beta:)](accelerate/bnns/activationfunction/geluapproximation2(alpha:beta:).md)
- [BNNS.ActivationFunction.gumbel(alpha:beta:)](accelerate/bnns/activationfunction/gumbel(alpha:beta:).md)
- [BNNS.ActivationFunction.gumbelMax(alpha:beta:)](accelerate/bnns/activationfunction/gumbelmax(alpha:beta:).md)
- [BNNS.ActivationFunction.hardShrink(alpha:)](accelerate/bnns/activationfunction/hardshrink(alpha:).md)
- [BNNS.ActivationFunction.hardSigmoid(alpha:beta:)](accelerate/bnns/activationfunction/hardsigmoid(alpha:beta:).md)
- [BNNS.ActivationFunction.hardSwish(alpha:beta:)](accelerate/bnns/activationfunction/hardswish(alpha:beta:).md)
- [BNNS.ActivationFunction.identity](accelerate/bnns/activationfunction/identity.md)
- [BNNS.ActivationFunction.leakyRectifiedLinear(alpha:)](accelerate/bnns/activationfunction/leakyrectifiedlinear(alpha:).md)
- [BNNS.ActivationFunction.linear(alpha:)](accelerate/bnns/activationfunction/linear(alpha:).md)
- [BNNS.ActivationFunction.linearWithBias(alpha:beta:)](accelerate/bnns/activationfunction/linearwithbias(alpha:beta:).md)
- [BNNS.ActivationFunction.logSigmoid](accelerate/bnns/activationfunction/logsigmoid.md)
- [BNNS.ActivationFunction.logSoftmax](accelerate/bnns/activationfunction/logsoftmax.md)
- [BNNS.ActivationFunction.rectifiedLinear](accelerate/bnns/activationfunction/rectifiedlinear.md)
- [BNNS.ActivationFunction.scaledTanh(alpha:beta:)](accelerate/bnns/activationfunction/scaledtanh(alpha:beta:).md)
- [BNNS.ActivationFunction.selu](accelerate/bnns/activationfunction/selu.md)
- [BNNS.ActivationFunction.sigmoid](accelerate/bnns/activationfunction/sigmoid.md)
- [BNNS.ActivationFunction.silu](accelerate/bnns/activationfunction/silu.md)
- [BNNS.ActivationFunction.softShrink(alpha:)](accelerate/bnns/activationfunction/softshrink(alpha:).md)
- [BNNS.ActivationFunction.softmax](accelerate/bnns/activationfunction/softmax.md)
- [BNNS.ActivationFunction.softplus(alpha:beta:)](accelerate/bnns/activationfunction/softplus(alpha:beta:).md)
- [BNNS.ActivationFunction.softsign](accelerate/bnns/activationfunction/softsign.md)
- [BNNS.ActivationFunction.tanh](accelerate/bnns/activationfunction/tanh.md)
- [BNNS.ActivationFunction.tanhShrink](accelerate/bnns/activationfunction/tanhshrink.md)
- [BNNS.ActivationFunction.threshold(alpha:beta:)](accelerate/bnns/activationfunction/threshold(alpha:beta:).md)

### Instance Properties

- [bnnsActivation](accelerate/bnns/activationfunction/bnnsactivation.md)