Code point
U+231C
Glyph appearance depends on your fonts.
U+231C
SoU+231C TOP LEFT CORNER 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+231C
8988
⌜
⌜
⌜
E2 8C 9C
231C
0000231C
%E2%8C%9C
\u231C
\u231C
\u231C
\231C