| — Magnitude / Residue

Function. Ranks: 0 monadic, 0 0 dyadic

|Y gives magnitude. Pervasive.

|¯3               ⍝ 3
|3j4              ⍝ 5

X|Y gives residue modulo X. Real residue has the modulus’s sign or is zero. Pervasive.

3|¯1 0 1 4        ⍝ 2 0 1 1
0|7               ⍝ 7

Complex residue uses complex floor.