---
title: math.mod() function
description: math.mod() returns a floating-point remainder of x/y.
url: https://docs.influxdata.com/flux/v0/stdlib/math/mod/
estimated_tokens: 1274
product: Flux
version: v0
---

# math.mod() function

-   Flux 0.22.0+
-   View InfluxDB support

`math.mod()` returns a floating-point remainder of `x/y`.

The magnitude of the result is less than `y` and its sign agrees with that of `x`.

**Note**: `math.mod()` performs the same operation as the modulo operator (`%`). For example: `4.56 % 1.23`

##### Function type signature

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

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

## Parameters

### x

(Required) x-value to use in the operation.

### y

(Required) y-value to use in the operation.

## Examples

-   [Return the modulo of two values](#return-the-modulo-of-two-values)
-   [Use math.mod in map](#use-mathmod-in-map)

### Return the modulo of two values

```js
import "math"

math.mod(x: 4.56, y: 1.23)// 0.8699999999999997

```

### Use math.mod in map

```js
import "math"

data
    |> map(fn: (r) => ({_time: r._time, _value: math.mod(x: r.t1, y: r.t2)}))
```

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

View example input and output

#### Input data

| _time | t1 | t2 |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | -2.18 | 19.85 |
| 2021-01-01T00:00:10Z | 10.92 | 4.97 |
| 2021-01-01T00:00:20Z | 7.35 | -3.75 |
| 2021-01-01T00:00:30Z | 17.53 | 19.77 |
| 2021-01-01T00:00:40Z | 15.23 | 13.86 |
| 2021-01-01T00:00:50Z | 4.43 | 1.86 |

#### Output data

| _time | _value |
| --- | --- |
| 2021-01-01T00:00:00Z | -2.18 |
| 2021-01-01T00:00:10Z | 0.9800000000000004 |
| 2021-01-01T00:00:20Z | 3.5999999999999996 |
| 2021-01-01T00:00:30Z | 17.53 |
| 2021-01-01T00:00:40Z | 1.370000000000001 |
| 2021-01-01T00:00:50Z | 0.7099999999999995 |