> 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/m/md4.md).

# MD4

```ruby
var digest = frequire('Digest::MD4')
say digest.md4_hex('Rosetta Code')
```

#### Output:

```
a52bcfc6a0d0d300cdc5ddbfbefe478b
```