Code point
U+2342
Glyph appearance depends on your fonts.
U+2342
SoU+2342 APL FUNCTIONAL SYMBOL QUAD BACKSLASH is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Miscellaneous Technical block.
Choose the representation you need, then copy its value.
U+2342
9026
⍂
⍂
E2 8D 82
2342
00002342
%E2%8D%82
\u2342
\u2342
\u2342
\2342