> For the complete documentation index, see [llms.txt](https://docs.documint.me/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.documint.me/templates/working-with-dynamic-data/functions-and-operators.md).

# Functions & Operators

{% hint style="warning" %}
Most formatting can be done in the settings for the Fields Token. This is mainly used for formatting that is not yet supported in the Fields Token UI.

<p align="center"><img src="/files/Jrqh22ZxebZOsgwbUYYp" alt=""></p>
{% endhint %}

Documint uses an enhanced version of [Handlebars](https://handlebarsjs.com/guide/#what-is-handlebars) as its templating engine. This means all valid Handlebars syntax is valid Documint syntax. Below is a list of custom functions that can be used in your Documint templates.&#x20;

#### Combining Functions

You can combine functions by wrapping the inner function in parenthesis.

```handlebars
//Example
{{$multiply ($add amount_1 amount_2) ($add amount_3 amount_4)}}
```

Here we're using the `$add` function to sum two sets of values then multiplying them together. Functions in parenthesis will be evaluated first and returned to its parent function.&#x20;

## General

### $calc

The $calc function is a powerful expression evaluator that enables complex calculations, string manipulations, array operations, and provides a secure sandbox environment within your templates.

{% content-ref url="/pages/jzOYDrwNo79Vip129bQJ" %}
[$calc](/legacy-documentation/data-and-variables/functions/calc.md)
{% endcontent-ref %}

## Math

{% content-ref url="/pages/XRj361DhecINJkv0L5np" %}
[$add](/templates/working-with-dynamic-data/functions-and-operators/functions/math/usdadd.md)
{% endcontent-ref %}

{% content-ref url="/pages/A5ApeBp9tyTlUWGZsrbr" %}
[$subtract](/templates/working-with-dynamic-data/functions-and-operators/functions/math/usdsubtract.md)
{% endcontent-ref %}

{% content-ref url="/pages/HIeiSb5VYDgIRf3sTzdd" %}
[$multiply](/templates/working-with-dynamic-data/functions-and-operators/functions/math/usdmultiply.md)
{% endcontent-ref %}

{% content-ref url="/pages/CTluG3WhoE7cWnyRiVo3" %}
[$divide](/templates/working-with-dynamic-data/functions-and-operators/functions/math/usddivide.md)
{% endcontent-ref %}

{% content-ref url="/pages/s4YsyYod2SUJzXh49hWR" %}
[$sum](/templates/working-with-dynamic-data/functions-and-operators/functions/math/usdsum.md)
{% endcontent-ref %}

{% content-ref url="/pages/6Qt29phABeLqZjshTHmb" %}
[$min](/templates/working-with-dynamic-data/functions-and-operators/functions/math/usdmin.md)
{% endcontent-ref %}

{% content-ref url="/pages/o9880uXz2lqwbzbJiNXl" %}
[$max](/templates/working-with-dynamic-data/functions-and-operators/functions/math/usdmax.md)
{% endcontent-ref %}

{% content-ref url="/pages/h3Ky97yMqx55gWPcLh97" %}
[$mean](/templates/working-with-dynamic-data/functions-and-operators/functions/math/usdmean.md)
{% endcontent-ref %}

{% content-ref url="/pages/16TCd3a0KIIaWseyiu3C" %}
[$round](/templates/working-with-dynamic-data/functions-and-operators/functions/math/usdround.md)
{% endcontent-ref %}

{% content-ref url="/pages/N936qw1WlJrTIGurBnde" %}
[$floor](/templates/working-with-dynamic-data/functions-and-operators/functions/math/usdfloor.md)
{% endcontent-ref %}

{% content-ref url="/pages/uyyLP5RCxejoK4pENuck" %}
[$ceil](/templates/working-with-dynamic-data/functions-and-operators/functions/math/usdceil.md)
{% endcontent-ref %}

## List/Arrays

{% content-ref url="/pages/7ICHllP0m5hQd6dafNsK" %}
[#each](/templates/working-with-dynamic-data/functions-and-operators/functions/list-arrays/each.md)
{% endcontent-ref %}

{% content-ref url="/pages/X1NEZumBAbGoEfIvL7po" %}
[$filter](/templates/working-with-dynamic-data/functions-and-operators/functions/list-arrays/usdfilter.md)
{% endcontent-ref %}

{% content-ref url="/pages/RFo5MKiCqzAN9rK7E81R" %}
[$group](/templates/working-with-dynamic-data/functions-and-operators/functions/list-arrays/usdgroup.md)
{% endcontent-ref %}

{% content-ref url="/pages/qaUtgp8lZYxKtRBsPP9h" %}
[$join](/templates/working-with-dynamic-data/functions-and-operators/functions/list-arrays/usdjoin.md)
{% endcontent-ref %}

## Helpers

{% content-ref url="/pages/rtMPOGDDEEsk4wIwH9Mn" %}
[$extname](/templates/working-with-dynamic-data/functions-and-operators/functions/helpers/usdextname.md)
{% endcontent-ref %}

{% content-ref url="/pages/iiymsusHXc6nwgRkKFad" %}
[$inspect](/templates/working-with-dynamic-data/functions-and-operators/functions/helpers/usdinspect.md)
{% endcontent-ref %}

## Content

{% content-ref url="/pages/E8dNzDQ79H7lp6J5MNTP" %}
[$link](/templates/working-with-dynamic-data/functions-and-operators/functions/content/usdlink.md)
{% endcontent-ref %}

{% content-ref url="/pages/a9MAUpJEcJJmRhRVsRD9" %}
[$md](/templates/working-with-dynamic-data/functions-and-operators/functions/content/usdmd.md)
{% endcontent-ref %}


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