terraform/website/docs/configuration/functions/sum.html.md

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---
layout: "functions"
page_title: "sum - Functions - Configuration Language"
sidebar_current: "docs-funcs-collection-sum"
description: |-
The sum function takes a list or set of numbers and returns the sum of those
numbers.
---
# `sum` Function
-> **Note:** This page is about Terraform 0.13 and later. For Terraform 0.11 and
earlier, see
[0.11 Configuration Language: Interpolation Syntax](../../configuration-0-11/interpolation.html).
`sum` takes a list or set of numbers and returns the sum of those numbers.
## Examples
```
> sum([10, 13, 6, 4.5])
33.5
```