> 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/s/sleep.md).

# Sleep

The `sleep` function argument is in units of seconds, but these may be fractional (to the limits of your system's clock).

```perl
my $sec = prompt("Sleep for how many microfortnights? ") * 1.2096;
say "Sleeping...";
sleep $sec;
say "Awake!";
```

Note that 1.2096 is a rational number in Raku, not floating point, so precision can be maintained even when dealing with very small powers of ten.