Up Arrow

The glyph up arrow is an upwards pointing arrow represented by the Unicode character, "upwards arrow". The up arrow has several uses in various dialects:
 * In all dialects,  is Take when used dyadically (except very early versions of APL\360, which used it for Rotate).
 * In SHARP APL,  is Nub when monadic.
 * In APL2, NARS2000, GNU APL, and APLX,, is First when monadic.
 * In Dyalog APL, dzaima/APL, and ngn/apl, , is Mix when monadic.