---
title: "ClikaRT::nn::Sub"
sidebar_label: "Sub"
description: "Subtracts other, scaled by alpha, from input elementwise with broadcasting: input - alpha * other, then the optional fused activation."
---

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

Subtracts `other`, scaled by alpha, from `input` elementwise with broadcasting: input - alpha \* other, then the optional fused activation. The module form of [`ClikaRT::ops::sub`](../ops/sub.md#sub), which documents the full contract (shapes, dtypes, errors); construct once, then call it like a function.

## Member functions

### Sub() {#Sub}

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`explicit` **`Sub`**([`SubOptions`](./SubOptions.md) `options` `=` `{}`)

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

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Declared in `ClikaRT/nn/generated/elementwise.h`, line 118

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### forward() {#forward}

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

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

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Declared in `ClikaRT/nn/generated/elementwise.h`, line 132

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

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

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

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Declared in `ClikaRT/nn/generated/elementwise.h`, line 136

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### options() {#options}

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

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The settings this module was constructed with.

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Declared in `ClikaRT/nn/generated/elementwise.h`, line 140

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