* 2R! ( x y R: a b -- R: x y ) store the value as the topmost value in the returnstack. see R@ for inverse operation ( >R'@ / R"@ / 2R@ / >2R! )
2R!
( x y R: a b -- R: x y )
R@
>R'@
R"@
2R@
>2R!
misc ordinary primitive