> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/perl6-rosettacode/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/perl6-rosettacode/programming_tasks/a/averages/root_mean_square.md).

# Root mean square

```perl
sub rms(*@nums) { sqrt ([+] @nums X** 2) / @nums }

say rms 1..10;
```

Here's a slightly more concise version, albeit arguably less readable:

```perl
sub rms { sqrt @_ R/ [+] @_ X** 2 }
```