-
-Y negates. Pervasive.
-Y
-3 ⍝ ¯3
X-Y subtracts. Pervasive.
X-Y
10-1 2 3 ⍝ 9 8 7
Characters shift by code point. Character differences are exact integers.
'd'-3 ⍝ 'a' 'd'-'a' ⍝ 3x
¯ marks negative literals.
¯