[texhax] where are latex functions defined?

[Robin Fairbairns]

> Thank you - that was helpful.  Now for a follow up question,
> where are the TeX functions defined?

in the texbook or tex the program or ...

http://www.tex.ac.uk/cgi-bin/texfaq2html?label=books+tutorials

of course, if you had looked at the faq you wouldn't have needed to
ask your first question, either.  consider:

http://www.tex.ac.uk/cgi-bin/texfaq2html?label=ltxcmds

which goes into rather more detail than you've already found
"helpful".