---
title: "ClikaRT::nn::ELU"
sidebar_label: "ELU"
description: "Exponential linear unit: scale * input for input > 0, scale * alpha * (exp(input_scale * input) - 1) otherwise."
---

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**Header:** `ClikaRT/nn/generated/activation.h`  
**Inherits:** [`ClikaRT::nn::Module`](./Module.md)

Exponential linear unit: scale \* input for input \> 0, scale \* alpha \* (exp(input\_scale \* input) - 1) otherwise. The module form of [`ClikaRT::ops::elu`](../ops/elu.md#elu), which documents the full contract (shapes, dtypes, errors); construct once, then call it like a function.

## Member functions

### ELU(ELUOptions) {#ELU}

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`explicit` **`ELU`**([`ELUOptions`](./ELUOptions.md) `options` `=` `{}`)

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Constructs the module from [`options`](./ELU.md#options) (every default when omitted).

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Declared in `ClikaRT/nn/generated/activation.h`, line 250

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### ELU(double) {#ELU-2}

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`explicit` **`ELU`**(`double` `alpha`)

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`ELU(alpha)`: the positional form of `ELUOptions(alpha)`.

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Declared in `ClikaRT/nn/generated/activation.h`, line 252

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### forward() {#forward}

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[`Tensor`](../Tensor.md) **`forward`**([`Tensor`](../Tensor.md) `input`) `const`

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[`forward_impl`](./ELU.md#forward), unwrapped: raises [`ClikaRT::Error`](../Error.md) on failure.

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Declared in `ClikaRT/nn/generated/activation.h`, line 271

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### operator()() {#operator-call}

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[`Tensor`](../Tensor.md) **`operator()`**([`Tensor`](../Tensor.md) `input`) `const`

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Same as [`forward`](./ELU.md#forward).

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Declared in `ClikaRT/nn/generated/activation.h`, line 275

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### options() {#options}

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`const` [`ELUOptions`](./ELUOptions.md)`&` **`options`**() `const`

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The settings this module was constructed with.

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Declared in `ClikaRT/nn/generated/activation.h`, line 279

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