⌊ — Floor / Minimum⌊Y rounds down. Pervasive; tolerant near integers.
⌊1.8 ¯1.8 ⍝ 1 ¯2
⌊3r2 ⍝ 1x
Complex floor uses APL’s Gaussian-integer rule.
⌊1.5j0.5 ⍝ 1j1
X⌊Y takes the real minimum. Pervasive. Empty reduction identity: ∞.
3⌊1 5 ⍝ 1 3