What ⨋ means
⨋ is the summation with integral. Unicode classifies it as a mathematical symbol and files it in the Supplemental Mathematical Operators block; this site shelves it under Maths.
Its appearance depends on the font and text styling.
How it is encoded
⨋ is a single code point, U+2A0B. In HTML that is ⨋, and in CSS \2A0B.
Don't confuse it with
4Questions people ask
1Why does ⨋ show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type ⨋
Windows (Word)
Alt+XType 2A0B, then Alt+X to get ⨋.
Windows
Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).
macOS
Control+Command+SpaceOpen the character viewer and search “summation with integral”.
Linux
Ctrl+Shift+UType 2a0b, then Enter or Space.
HTML
⨋CSS
\2A0BCodes and encoding1 code points
HTML decimal
⨋
HTML hex
⨋
CSS content
content: "\2A0B";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%A8%8B
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.