"But what does t. do?" Use the dictionary.
t. is an adverb. The dictionary heading on the page says u t. 0 0 0 This means (and it took me 2 years before I understood how to read dictionary headings. I learned a lot of j via the "parts of speech" dictionary access page) The verb formed by u t. has rank 0 0 0 u t. is a verb. therefor t. is an adverb. The production adverb noun is a j syntax error. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm