display

DISPLAY
APL his DISPLAY (or ⎕DISPLAY in APLX)
not sure about q

Q shows type on some numbers, e.g. booleans and floats.
e.g. 101b or 2.6f

A one-item list is displayed with a leading comma
q) enlist 34.5
,34.5

strand notation
APL: applies generally
Q: only applies to certain types