> For the complete documentation index, see [llms.txt](https://brianbuccaneer.gitbook.io/bottlenose/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://brianbuccaneer.gitbook.io/bottlenose/dev-2/data-analysis/rxstats/operators/roundto.md).

# roundTo

## Description

Rounds numbers in an `Observable` to the number of desired decimal places.

## Examples

```javascript
import { from } from 'rxjs';
import { roundTo } from '@bottlenose/rxstats';

const num$ = from([1.234567, 4.5678]);
const roundedNum$ = num$.pipe(
  roundTo(3)
);
roundedNum$.subscribe(console.log);
// Output:
// 1.235
// 4.568
```

## API

```
sum(numDecimalPlaces: Number)
```

### Since

0.1

### Parameters

* `numDecimalPlaces`: An integer that indicates the number of decimal places to which numbers should be rounded.

### Options

None

### Returns

`Number`. (Numbers from `Observable`, rounded to the correct number of decimal places.)