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Math

Hugo provides six mathematical operators in templates.

2017-02-01

functions

docs

parent
functions

false

There are 6 basic mathematical operators that can be used in Hugo templates:

Function	Description	Example
`add`	Adds two integers.	`{{add 1 2}}` → 3
`div`	Divides two integers.	`{{div 6 3}}` → 2
`mod`	Modulus of two integers.	`{{mod 15 3}}` → 0
`modBool`	Boolean of modulus of two integers. Evaluates to `true` if = 0.	`{{modBool 15 3}}` → true
`mul`	Multiplies two integers.	`{{mul 2 3}}` → 6
`sub`	Subtracts two integers.	`{{sub 3 2}}` → 1

Use `add` with Strings

You can also use the add function with strings. You may like this functionality in many use cases, including creating new variables by combining page- or site-level variables with other strings.

For example, social media sharing with Twitter Cards requires the following meta link in your site's <head> to display Twitter's "Summary Card with Large Image":

<meta name="twitter:image" content="https://example.com/images/my-twitter-image.jpg">

Let's assume you have an image field in the front matter of each of your content files:

---
title: My Post
image: my-post-image.jpg
---

You can then concatenate the image value (string) with the path to your images directory in static and leverage a URL-related templating function for increased flexibility:

{{% note %}} The add example above makes use of the absURL function. absURL and its relative companion relURL is the recommended way to construct URLs in Hugo. {{% /note %}}

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Use add with Strings

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Use `add` with Strings