SYMBOL
∑ n-ary summation
Unicode information
n-ary summationN-ARY SUMMATIONU+2211∑∑\2211\u2211Math17.0Meaning of ∑ n-ary summation
The ∑ symbol represents the sum of multiple terms and is used to write summations compactly.
Common uses
- Summations.
- Series and statistics.
- Mathematical and scientific formulas.
How to type ∑ on Windows, Mac and mobile
Windows
The universal method is to use Copy on this page and paste ∑. On Windows 10/11 you can press Win + . and browse the Symbols section, or open Character Map (charmap) to locate characters supported by your fonts.
Mac
Press Control + Command + Space to open Character Viewer, search for n-ary summation, then double-click it to insert the character.
Microsoft Word
Type 2211 without U+, then immediately press Alt + X. Word converts the code into ∑. You can also use Insert → Symbol.
Google Docs
Open Insert → Special characters and search by name, or paste ∑ directly. For emoji, you can also use your operating system emoji picker.
iPhone / iPad
iOS does not provide a direct Unicode-code entry method for every symbol. Copy ∑ from SymbolDex or check long-press variants on related keys. For frequent use, create a shortcut under Settings → General → Keyboard → Text Replacement.
Android
Availability varies by Android keyboard. In Gboard, browse the symbols panel and long-press related keys for variants. If it is not available, copy ∑ from SymbolDex and paste it where needed.
Linux
In many Linux apps using GTK/IBus, press Ctrl + Shift + U, type 2211, then confirm with Enter or Space. If your app does not support this method, copy and paste ∑.
Web and programming codes
Copy the representation you need for HTML, CSS, JavaScript or Python. For emoji sequences, SymbolDex includes every code point in the correct order.
∑∑\2211\u2211\u2211∑Usage examples
∑ xᵢ∑ₙ₌₁ⁿ nS = ∑ aᵢ