---
title: "ClikaRT::nn::Where"
sidebar_label: "Where"
description: "Elementwise select with broadcasting: input where condition holds, other elsewhere."
---

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

Elementwise select with broadcasting: `input` where `condition` holds, `other` elsewhere. The module form of [`ClikaRT::ops::where`](../ops/where.md#where), which documents the full contract (shapes, dtypes, errors); construct once, then call it like a function.

## Member functions

### Where() {#Where}

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`explicit` **`Where`**([`WhereOptions`](./WhereOptions.md) `options` `=` `{}`)

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

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Declared in `ClikaRT/nn/generated/elementwise.h`, line 473

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### forward() {#forward}

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[`Tensor`](../Tensor.md) **`forward`**(<br />
&nbsp;&nbsp;&nbsp;&nbsp;[`Tensor`](../Tensor.md) `condition`,<br />
&nbsp;&nbsp;&nbsp;&nbsp;[`Tensor`](../Tensor.md) `input`,<br />
&nbsp;&nbsp;&nbsp;&nbsp;[`Tensor`](../Tensor.md) `other`<br />
) `const`

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

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Declared in `ClikaRT/nn/generated/elementwise.h`, line 486

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

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[`Tensor`](../Tensor.md) **`operator()`**(<br />
&nbsp;&nbsp;&nbsp;&nbsp;[`Tensor`](../Tensor.md) `condition`,<br />
&nbsp;&nbsp;&nbsp;&nbsp;[`Tensor`](../Tensor.md) `input`,<br />
&nbsp;&nbsp;&nbsp;&nbsp;[`Tensor`](../Tensor.md) `other`<br />
) `const`

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

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Declared in `ClikaRT/nn/generated/elementwise.h`, line 491

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### options() {#options}

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`const` [`WhereOptions`](./WhereOptions.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 496

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