The most recent version of this documentation can be found at https://docs.dyalog.com/20.0/.
Monadic ⎕DR means
A←10
⎕DR A
83
Dyadic ⎕DR means
A←10
11 ⎕DR A
0 0 0 0 1 0 1 0
The most recent version of this documentation can be found at https://docs.dyalog.com/20.0/.
A←10
⎕DR A
83
A←10
11 ⎕DR A
0 0 0 0 1 0 1 0