---
title: + (add)
slug: add
docTags: 
createdAt: 2021-09-14T17:53:05.000Z
---

An operator used to add two or more expressions.

### Syntax

`valueOne + valueTwo + valueThree + ...`

### Sample usage

`1 + 2 + 3` returns `6`

`"concat" + "enate"` returns `concatenate`

`('2021-01-01') + 1` returns `2021-01-02`

### Supported data types

- If two `Numbers`, `Money` values, or `Percents` are added together, the values will be added.
- If either side is a `String`, then both sides will be concatenated as a `String`.
- If either side is a `List`, then both sides are cast to `Lists` and the two `Lists` will be joined together.
- If the left side is a `Date`, and the right side is a `Number`, it will return the date plus that many days.
- If a `Money` value and a `Number` value are added, the `Money` value will increase by the value of the `Number`.
- If a `Percent` value and a `Number` value are added, the `Number` value will increase by the value of the `Percent`.

### See also

- [Number](docId\:ucI5tCTfVBhonEJ6ZQijg)
- [Money](docId:_kS5D2xbfoR9d8WfRIVnY) 
- [Percent](docId\:FbN7bFaHlFPV4f1C53DxA) 
- [String](docId\:Ujw2AQAktel5uukLuP73S) 
- [Date](docId\:xTAQdzvLBTAKjxRnpFwe9) 
- [- (subtract)](docId\:X9JOQMWHVhTajOgmjlbUa)