---
title: "ClikaRT::ops::log"
sidebar_label: "log"
description: "Elementwise natural logarithm. \\[ \\ln(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>

## log() {#log}

<div class="api-signature">

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

</div>

Elementwise natural logarithm.

$$
\ln(x_i)
$$

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::log(x);
```

<div class="api-declared">

Declared in `ClikaRT/compute/ops.h`, line 5118

</div>