Documentation at en:Template:NUMBEROF.
First parameter: articles
, pages
, edits
, users
, activeusers
, admins
or files
To show the number of articles of the French Wikipedia in format raw:
{{NUMBEROF|articles|fr}}
→ 2604348To show the number of pages on be-tarask in format raw:
{{NUMBEROF|pages|be-tarask}}
→ 248197To show the number of pages on be-tarask:
{{NUMBEROF|pages|be-tarask|N}}
→ 248 197