---
title: "ClikaRT::ops::log2"
sidebar_label: "log2"
description: "Elementwise base-2 logarithm. \\[ \\log_{2}(x_i) \\] Zero produces -inf; negative inputs produce NaN. Value-domain violations follow IEEE semantics (NaN / ±inf in the result), never an error."
---

<!-- Generated by tools/doxygen2mdx from Doxygen XML. Do not edit. -->

<span class="api-kind api-kind--function">function</span>

## log2() {#log2}

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[`Tensor`](../Tensor.md) **`log2`**([`Tensor`](../Tensor.md) `input`)

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Elementwise base-2 logarithm.

$$
\log_{2}(x_i)
$$

Zero produces -inf; negative inputs produce NaN. Value-domain violations follow IEEE semantics (NaN / ±inf in the result), never an error.

**Throws**

- `ClikaRT::Error`: when the input's dtype is not served for this operation (the machine-readable reason rides `code_name()`).

**Returns:** a new tensor, same shape and dtype as `input`.

```cpp
auto y = ClikaRT::ops::log2(x);
```

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Declared in `ClikaRT/compute/ops.h`, line 5169

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