---
title: math.gamma() function
description: math.gamma() returns the gamma function of x.
url: https://docs.influxdata.com/flux/v0/stdlib/math/gamma/
estimated_tokens: 1402
product: Flux
version: v0
---

# math.gamma() function

-   Flux 0.22.0+
-   View InfluxDB support

`math.gamma()` returns the gamma function of `x`.

##### Function type signature

```js
(x: float) => float
```

For more information, see [Function type signatures](/flux/v0/function-type-signatures/).

## Parameters

### x

(Required) Value to operate on.

## Examples

-   [Return the gamma function of a value](#return-the-gamma-function-of-a-value)
-   [Use math.gamma in map](#use-mathgamma-in-map)

### Return the gamma function of a value

```js
import "math"

math.gamma(x: 2.12)// 1.056821007887572

```

### Use math.gamma in map

```js
import "sampledata"
import "math"

sampledata.float()
    |> map(fn: (r) => ({r with _value: math.gamma(x: r._value)}))
```

[](#view-example-input-and-output)

View example input and output

#### Input data

| _time | *tag | _value |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | t1 | -2.18 |
| 2021-01-01T00:00:10Z | t1 | 10.92 |
| 2021-01-01T00:00:20Z | t1 | 7.35 |
| 2021-01-01T00:00:30Z | t1 | 17.53 |
| 2021-01-01T00:00:40Z | t1 | 15.23 |
| 2021-01-01T00:00:50Z | t1 | 4.43 |

| _time | *tag | _value |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | t2 | 19.85 |
| 2021-01-01T00:00:10Z | t2 | 4.97 |
| 2021-01-01T00:00:20Z | t2 | -3.75 |
| 2021-01-01T00:00:30Z | t2 | 19.77 |
| 2021-01-01T00:00:40Z | t2 | 13.86 |
| 2021-01-01T00:00:50Z | t2 | 1.86 |

#### Output data

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | -2.4674191070057323 | t1 |
| 2021-01-01T00:00:10Z | 3007373.527042938 | t1 |
| 2021-01-01T00:00:20Z | 1399.634749015074 | t1 |
| 2021-01-01T00:00:30Z | 93234791408407.83 | t1 |
| 2021-01-01T00:00:40Z | 161558763355.0403 | t1 |
| 2021-01-01T00:00:50Z | 10.560583496997582 | t1 |

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | 77953108609300690 | t2 |
| 2021-01-01T00:00:10Z | 22.94201890526749 | t2 |
| 2021-01-01T00:00:20Z | 0.26786612886141653 | t2 |
| 2021-01-01T00:00:30Z | 61513013150171220 | t2 |
| 2021-01-01T00:00:40Z | 4328485003.951652 | t2 |
| 2021-01-01T00:00:50Z | 0.9486870416779484 | t2 |