Windows
No classic numeric Alt code. Copy the character or use Win + . and search the name.
Math
How to type N-ary summation (∑)
Copy the character, or use the shortcut that matches your keyboard and app.
Mac
Option + W
Microsoft Word
Type 2211 then Alt + X
Google Docs
Insert → Special characters → sum
How to insert it
Copy
Click the keycap, then paste with Ctrl+V or Cmd+V.
Alt code
This character has no short Alt code. Copy it instead.
Code
Use the Unicode, HTML, CSS, or JS value below in documents and stylesheets.
- Unicode
U+2211- HTML decimal
∑- HTML hex
∑- CSS
\2211- JavaScript
\u{2211}