Code point
U+2230
Glyph appearance depends on your fonts.
U+2230
Sm<compat> 222E 222E 222EU+2230 VOLUME INTEGRAL is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Mathematical Operators block.
Choose the representation you need, then copy its value.
U+2230
8752
∰
∰
∰
E2 88 B0
2230
00002230
%E2%88%B0
\u2230
\u2230
\u2230
\2230