gohugoio-hugo/docs/content/en/functions/upper.md

title, description, godocref, date, publishdate, lastmod, keywords, categories, menu, toc, signature, workson, hugoversion, relatedfuncs, deprecated, draft, aliases

title	description	godocref	date	publishdate	lastmod	keywords	categories	menu	toc	signature	workson	hugoversion	relatedfuncs	deprecated	draft	aliases
upper	Converts all characters in a string to uppercase		2017-02-01	2017-02-01	2017-02-01		functions	docs parent functions		upper INPUT				false	false

Note that upper can be applied in your templates in more than one way:

{{ upper "BatMan" }} → "BATMAN"
{{ "BatMan" | upper }} → "BATMAN"