Function - Function Summary
Defines a user function with local words.
function spec vars body
spec - Optional help info followed by arg words (and optional type and string) (must be: block)
vars - List of words that are local to the function (must be: block)
body - The body block of the function (must be: block)
FUNCTION is identical to FUNC but includes a block in which you can name words considered LOCAL to the function.
does - A shortcut to define a function that has no arguments or locals.