Trace Controls ⎕TRACE
Dyadic ⎕TRACE means
+(0,⍳10) ⎕TRACE 'foo'
0 1 2 3 4 5
Monadic ⎕TRACE means
⎕TRACE 'foo'
0 1 2 3 4 5
⎕TRACE means +(0,⍳10) ⎕TRACE 'foo'
0 1 2 3 4 5
⎕TRACE means ⎕TRACE 'foo'
0 1 2 3 4 5