unprompted/docs/shortcodes/length.md

Returns the number of items in a delimited string or [array] variable.

Supports the optional _delimiter argument which lets you specify the separator between each item. It defaults to your config's syntax.delimiter value (|).

Supports the optional _max argument which caps the value returned by this shortcode. Defaults to -1, which is "no cap."

[length "item one|item two|item three"]

Result: 3