> For the complete documentation index, see [llms.txt](https://docs.fylr.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fylr.io/for-developers/user-data-types/double.md).
# double
The type `double` supports store and load for a floating point number with 64 bits (Go type `float64`). The range for that number is approximately `-1.7976931348623157e+308` to `1.7976931348623157e+308`. Go adheres to [IEEE 754](https://en.wikipedia.org/wiki/IEEE_754) for storing the values.
## API
Double looks like this when send and received over the API:
```json
{
"double": 1234.5678
}
```
Numbers are guaranteed to keep their value, but the JSON parser may change `1e4` into `10000` upon load.
## Index
The type `double` is stored as type [`double`](https://www.elastic.co/guide/en/elasticsearch/reference/current/number.html) in the indexer.
## Sorting
The sorting is independent of the requested search language.
## Export
The export of the value is not localized.
The XML Export looks like this:
```xml
1234.56789
```
This shows the example export for column `double` and a value of `1234.56789`.
**CSV** and **JSON** export the number as is.
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:
```
GET https://docs.fylr.io/for-developers/user-data-types/double.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.