---
title: ES|QL E function
description: 
url: https://www.elastic.co/elastic/docs-builder/docs/3028/reference/query-languages/esql/functions-operators/math-functions/e
products:
  - Elasticsearch
---

# ES|QL E function
## Syntax

![Embedded](https://www.elastic.co/elastic/docs-builder/docs/3028/reference/query-languages/esql/images/functions/e.svg)


## Parameters


## Description

Returns [Euler’s number](https://en.wikipedia.org/wiki/E_(mathematical_constant)).

## Supported types


| result |
|--------|
| double |


## Example

```esql
ROW E()
```


| E():double        |
|-------------------|
| 2.718281828459045 |