DUP
DUMP
DUP>R
DUP
( a -- a a )
ansi
.6.1.1290
<
CORE
>
duplicate the cell on top of the stack - so the two topmost cells have the same value (they are equal w.r.t
=
) , see
DROP
for the inverse
reference: p4_dup in ../src/core.c:1003, export CO DUP