# `round`

## Description

Returns a number rounded to the nearest integer or to a specified number of decimal places. For example, `1.5` becomes `2` and `8.1` becomes `8`.

## Syntax

Like many functions in DataPrime, `round` supports [two notations](https://coralogix.com/docs/dataprime/language-reference/functions-reference/index.md), **function** and **method** notation. These interchangeable forms allow flexibility in how you structure expressions.

```dataprime
round(number: number, digits: number?): number
```

```dataprime
(number: number).round(digits: number?): number
```

## Arguments

| Name   | Type   | Required  | Description                                                           |
| ------ | ------ | --------- | --------------------------------------------------------------------- |
| number | number | **true**  | The value to round                                                    |
| digits | number | **false** | Number of decimal places to round to. Defaults to `0` (whole numbers) |

## Example

**Use case: Round averages for discrete counts**

Compute the average number of online users and round to a whole number for clarity. Example: `569.5` becomes `570`.

**Use case 2: Round latency values for readability**

When analyzing traces, average latency values may have long decimal places. Use `round` with `2` digits for cleaner results.

### Example data

```json
{
    "total_users_online": 1093
},
{
    "total_users_online": 942
},
{
    "total_users_online": 120
},
{
    "total_users_online": 123
}
```

### Example query

```dataprime
aggregate round(avg(total_users_online)) as average_users_online
```

```dataprime
aggregate total_users_online.avg().round() as average_users_online
```

### Example output

```json
{
    "average_users_online": 570
}
```