---
title: "ClikaRT::nn::CELU"
sidebar_label: "CELU"
description: "Continuously differentiable exponential linear unit: max(0, input) + min(0, alpha * (exp(input / alpha) - 1))."
---

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

Continuously differentiable exponential linear unit: max(0, input) + min(0, alpha \* (exp(input / alpha) - 1)). The module form of [`ClikaRT::ops::celu`](../ops/celu.md#celu), which documents the full contract (shapes, dtypes, errors); construct once, then call it like a function.

## Member functions

### CELU(CELUOptions) {#CELU}

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`explicit` **`CELU`**([`CELUOptions`](./CELUOptions.md) `options` `=` `{}`)

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

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Declared in `ClikaRT/nn/generated/activation.h`, line 375

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

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`explicit` **`CELU`**(`double` `alpha`)

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`CELU(alpha)`: the positional form of `CELUOptions(alpha)`.

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Declared in `ClikaRT/nn/generated/activation.h`, line 377

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

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Declared in `ClikaRT/nn/generated/activation.h`, line 394

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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`](./CELU.md#forward).

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Declared in `ClikaRT/nn/generated/activation.h`, line 398

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### options() {#options}

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`const` [`CELUOptions`](./CELUOptions.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 402

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