Word |
Effect |
Standard Forth |
Minimal Forth |
DROP |
( a - ) |
drop |
t! |
DUP |
( a - aa ) |
dup |
t! t@ t@ |
SWAP |
( ab - ba ) |
swap |
t! >r t@ r> |
NIP |
( ab - b ) |
swap drop |
>r t! r> |
OVER |
( ab - aba ) |
>r dup r> swap |
>r t! t@ r> t@ |
TUCK |
( ab - bab ) |
dup >r swap r> |
t! >r t@ r> t@ |
ROT |
( abc - bca ) |
>r swap r> swap |
>r >r t! r> r> t@ |
2SWAP |
( abcd - cdab ) |
>r swap >r swap r> r> swap >r swap r> |
>r t! >r >r t@ r> r> r> t! >r >r t@ r> r> |
2DUP |
( ab - abab ) |
>r dup r> dup >r swap r> |
t! t@ t@ >r >r t! t@ r> t@ r> |
2OVER |
( abcd - abcdab ) |
n/a |
n/a |
2DROP |
( ab - ) |
drop drop |
t! t! |
-ROT |
( abc - cab ) |
swap >r swap r> |
t! >r >r t@ r> r> |
3REV |
( abc - cba ) |
swap >r swap r> swap |
t! >r t@ >r t! r> r> t@ |
4REV |
( abcd - dcba ) |
>r swap r> swap >r swap >r swap r> swap r> swap |
t! >r t@ >r t! r> r> t@ >r >r >r t! r> r> r> t@ |
THIRD |
( abc - abca ) |
>r >r dup r> swap r> swap |
>r >r t! t@ r> r> t@ |
FOURTH |
( abcd - abcda ) |
>r >r >r dup r> swap r> swap r> swap |
>r >r >r t! t@ r> r> r> t@ |
3DUP |
( abc - abcabc ) |
dup >r swap dup >r swap >r >r dup r> swap r> swap r> r> |
n/a |