---
page_title: sum - Functions - Configuration Language
description: The sum function takes a list or set of numbers and returns the sum of those numbers.
---

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> [!IMPORTANT]  
> **Documentation Update:** Product documentation previously located in `/website` has moved to the [`hashicorp/web-unified-docs`](https://github.com/hashicorp/web-unified-docs) repository, where all product documentation is now centralized. Please make contributions directly to `web-unified-docs`, since changes to `/website` in this repository will not appear on developer.hashicorp.com.
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# `sum` Function

`sum` takes a list or set of numbers and returns the sum of those numbers.

`sum` fails when given an empty list or set.

## Examples

```
> sum([10, 13, 6, 4.5])
33.5
```