The help package provides inline help (available in an interactive manner under Lua interpreter) in Torch5. It is automatically required by the torch package, so you should not have to require it in general.

It contains only one function:

Navigating through help is achieved with help(i) (i being a number) for jumping to the =i=-th available section, or =help('*i=') to jump to the =i=-th available link.

help(-1) is a particular case, which jumps back to the previous page you were displaying.