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

# `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
```