⅀ Double-Struck N-Ary Summation Symbol: Copy & Paste

Unicode information

NameDouble-Struck N-Ary Summation

Unicode nameDOUBLE-STRUCK N-ARY SUMMATION

Code pointU+2140

HTML decimal⅀

HTML hex⅀

CSS\2140

JavaScript\u2140

CategoryMath

Unicode17.0

Meaning of ⅀ Double-Struck N-Ary Summation

The ⅀ character is listed as Double-Struck N-Ary Summation in SymbolDex. Its technical Unicode name is DOUBLE-STRUCK N-ARY SUMMATION. It is associated with mathematical notation; its exact function depends on the formula or notation system in which it appears.

Common uses

Mathematical formulas and expressions.
Scientific, technical or educational documentation.
Unicode text that requires this specific notation.

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 Double-Struck N-Ary Summation, then double-click it to insert the character.

Microsoft Word

Type 2140 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 2140, 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.

HTML decimal⅀

HTML hex⅀

CSS content\2140

JavaScript\u2140

Python\u2140

Unicode text⅀

Usage examples

⅀ — Double-Struck N-Ary Summation

Unicode: U+2140

HTML: ⅀