> 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/e/even_or_odd.md).

# Even or odd

Raku doesn't have a built-in for this, but with subsets it's easy to define a predicate for it.

```perl
subset Even of Int where * %% 2;
subset Odd of Int where * % 2;

say 1 ~~ Even; # false
say 1 ~~ Odd;  # true
say 1.5 ~~ Odd # false ( 1.5 is not an Int )
```