> For the complete documentation index, see [llms.txt](https://daseldocs.tomwright.me/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://daseldocs.tomwright.me/v2/functions/len.md).

# Len

Len expects no arguments and can be used on lists or objects. It returns the number of elements contained within the list/map.

## Examples

```
$ echo '{"numbers":[1,2,3,4,5,6,7,8,9]}' | dasel -r json 'len()'
1

$ echo '{"numbers":[1,2,3,4,5,6,7,8,9]}' | dasel -r json 'numbers.len()'
9
```