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elasticsearch/docs/reference/query-languages/esql/_snippets/functions/atan.md
Colleen McGinnis b7e3a1e14b
[docs] Migrate docs from AsciiDoc to Markdown (#123507) 
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---------

Co-authored-by: Liam Thompson <32779855+leemthompo@users.noreply.github.com>
Co-authored-by: Liam Thompson <leemthompo@gmail.com>
Co-authored-by: Martijn Laarman <Mpdreamz@gmail.com>
Co-authored-by: István Zoltán Szabó <szabosteve@gmail.com>
2025-02-27 17:56:14 +01:00

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ATAN [esql-atan]

Syntax

:::{image} ../../../../../images/atan.svg :alt: Embedded :class: text-center :::

Parameters

number
Numeric expression. If null, the function returns null.

Description

Returns the arctangent of the input numeric expression as an angle, expressed in radians.

Supported types

number result
double double
integer double
long double
unsigned_long double

Example

ROW a=12.9
| EVAL atan=ATAN(a)
a:double atan:double
12.9 1.4934316673669235