= Bloblang Functions
// tag::single-source[]
:description: A list of Bloblang functions

// © 2024 Redpanda Data Inc.


Functions can be placed anywhere and allow you to extract information from your environment, generate values, or access data from the underlying message being mapped:

```bloblang
root.doc.id = uuid_v4()
root.doc.received_at = now()
root.doc.host = hostname()
```

Functions support both named and nameless style arguments:

```bloblang
root.values_one = range(start: 0, stop: this.max, step: 2)
root.values_two = range(0, this.max, 2)

# In:  {"max":10}
```
{{#each functions}}

include::connect:components:partial$bloblang-functions/{{this}}.adoc[leveloffset=+1]
{{/each}}

// end::single-source[]