U+2211
| OS | Layout | Shortcut |
|---|---|---|
| Windows(you) | Us | AltGr + W |
| Windows | Uk | AltGr + W |
| Windows | German | AltGr + W |
| macOS | Us | — |
| macOS | Uk | Option + W |
| macOS | German | Option + W |
| Application | How to insert N-Ary Summation |
|---|---|
| Microsoft Word | Type 2211, then press Alt+X |
| Excel / Google Sheets | Use the formula =UNICHAR(8721) |
| Google Docs | Insert → Special characters, then search "n-ary summation" |
| HTML | ∑ or ∑ |
| CSS (content property) | content: "\2211" |
| JavaScript | "\u2211" |
The summation symbol (capital Greek sigma) indicates the sum of a sequence of numbers or expressions.
Used in mathematics and statistics for summation notation. Example: ∑(i=1 to n) represents adding all terms from 1 to n.