> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/sidef-lang/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/sidef-lang/programming_tasks/t/terminal-control/unicode_output.md).

# Unicode output

```ruby
if (/\bUTF-?8/i ~~ [ENV{"LC_ALL","LC_CTYPE","LANG"}]) {
    say "△"
} else {
    die "Terminal can't handle UTF-8.\n"
}
```