---
title: linear
framework: accelerate
role: symbol
role_heading: Type Property
path: accelerate/bnnsactivationfunction/linear
---

# linear

An activation function that returns its input multiplied by a specified value.

## Declaration

```swift
static var linear: BNNSActivationFunction { get }
```

## Discussion

Discussion This constant defines an activation function that returns values using the following operation: alpha*x Use alpha to specify the multiplier: var activation = BNNSActivation(function: .linear,                                 alpha: 0.2) The following illustrates the output that the activation function generates from inputs in the range -10...10:

## See Also

### Activation Functions

- [abs](accelerate/bnnsactivationfunction/abs.md)
- [clamp](accelerate/bnnsactivationfunction/clamp.md)
- [identity](accelerate/bnnsactivationfunction/identity.md)
- [integerLinearSaturate](accelerate/bnnsactivationfunction/integerlinearsaturate.md)
- [integerLinearSaturatePerChannel](accelerate/bnnsactivationfunction/integerlinearsaturateperchannel.md)
- [leakyRectifiedLinear](accelerate/bnnsactivationfunction/leakyrectifiedlinear.md)
- [rectifiedLinear](accelerate/bnnsactivationfunction/rectifiedlinear.md)
- [scaledTanh](accelerate/bnnsactivationfunction/scaledtanh.md)
- [sigmoid](accelerate/bnnsactivationfunction/sigmoid.md)
- [softmax](accelerate/bnnsactivationfunction/softmax.md)
- [tanh](accelerate/bnnsactivationfunction/tanh.md)