: aword 10 0 do i . 5 0 do i . j . loop loop ;i will range from 0 to 4 and j will range from 0 to 9 in the inner loop. i in the outer do loop is the same as j in the inner loop.
: aword 10 0 do i . 5 0 do 2 0 do i . k . loop loop loop ;i will range from 0 to 1 and k will range from 0 to 9 in the inner loop. i in the outer-most do loop is the same as k in the inner loop.
: aword begin other-words ?terminal until key ;?terminal is typically called before key to ensure that a key is indeed ready to be read before calling key.