> 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/s/sha-256.md).

# SHA-256

```ruby
var sha = frequire('Digest::SHA')
say sha.sha256_hex('Rosetta code')
```

#### Output:

```
764faf5c61ac315f1497f9dfa542713965b785e5cc2f707d6468d7d1124cdfcf
```