| Character | ∑ |
| Name | N-Ary Summation |
| Unicode Code Point | U+2211 |
| Decimal Value | 8721 |
| Hex Value | 0x2211 |
| Category | Math Operators |
| Windows Alt Code | Not available — use copy/paste |
| Word Alt+X Code | 2211 + Alt+X |
| Mac Shortcut | Option+W |
| HTML Entity | ∑ |
| HTML Code (Dec / Hex) | ∑ / ∑ |
| CSS Content Code | content: "\2211"; |
| JavaScript Unicode Escape | "\u{2211}" |
N-Ary Summation is a formal mathematical operator or relation symbol used in academic and technical writing — algebra, calculus, logic, or set theory — to express a precise mathematical relationship concisely.
Unicode block: Mathematical Operators (U+2200–U+22FF). This large block standardizes the symbols used across algebra, calculus, logic, and set theory, replacing the inconsistent, often hand-drawn notation used before digital typesetting.
At Unicode code point U+2211 (decimal 8721), N-Ary Summation is the 18th of 256 characters cataloged in this category on How To Type Any Symbol. In terms of typing methods, it has a documented Mac keyboard shortcut, though no legacy Windows Alt code (Windows Alt codes only cover the original 0–255 codepage range) — Windows users generally rely on copy-paste for it. Regardless of platform, clicking the copy button above places the exact character on your clipboard, ready to paste into any application that accepts Unicode text.
💡 Good to know: Not all fonts render the full math-operator block correctly — technical documents commonly specify a math-specific font (like Cambria Math or Latin Modern Math) for reliable rendering.
No alt code available — click the copy button above and paste with Ctrl+V.
Press Option+W.
Click the symbol above to copy it, then paste anywhere — works on every device and OS.
Use the entity ∑ in your HTML.