SymbolHub

Integers Symbol (ℤ)

The integers symbol ℤ is Unicode U+2124, the blackboard-bold Z for the integers. Press Copy to put it on your clipboard.

Unicode
U+2124
HTML
ℤ
Word
2124 Alt+X

How to type the integers symbol (ℤ)

The quickest way is to press Copy above and paste. To type ℤ yourself, use the method for your device below.

Windows

  1. In Word or Outlook, type 2124 and press Alt + X. Alt + X converts the hex code before the cursor into the character, and back again.
  2. Press Win + R, type charmap and press Enter. Tick “Advanced view”, search for Double-Struck Capital Z, then Select and Copy. Character Map is built into every version of Windows.

Mac

  1. Press Control + Command + Space to open the Character Viewer, search for double-struck capital z and double-click it.
  2. With the Unicode Hex Input keyboard enabled (System Settings → Keyboard → Input Sources), hold Option and type 2124.

Linux & ChromeOS

  1. Press Ctrl + Shift + U, type 2124, then press Enter or Space. Works in GTK and IBus apps (GNOME, Firefox, Chrome, LibreOffice) and on ChromeOS.

iPhone & iPad

  1. Copy ℤ from this page, then go to Settings → General → Keyboard → Text Replacement and add it with a shortcut such as ;inte. The shortcut then turns into the symbol as you type, in every app.

Android

  1. Copy ℤ here, then open Gboard settings → Dictionary → Personal dictionary and add it with a shortcut.

Microsoft Word

  1. Type 2124, then press Alt + X.
  2. Insert → Symbol → More Symbols. Set “from” to Unicode (hex), type 2124 in “Character code” and click Insert.

Google Docs

  1. Insert → Special characters, then search for “double-struck capital z” or draw it in the box.

Excel & Google Sheets

  1. Enter =UNICHAR(8484) in a cell. It works in Excel 2013 and later and in Google Sheets.

HTML

  1. Write ℤ or ℤ in your HTML.

What does ℤ mean?

ℤ is the set of integers: …, −2, −1, 0, 1, 2, … The Z comes from the German Zahlen, “numbers”, a legacy of the German algebraists who shaped the notation. With a subscript it names the integers modulo n, as in ℤ₁₂ for clock arithmetic, and ℤ⁺ is often used for the positive integers.

Common uses

  • Number theory: k ∈ ℤ
  • Modular arithmetic: ℤ/nℤ

Integers Symbol codes for HTML, CSS and programming

Every code below produces ℤ. Use the HTML entity in web pages, the CSS escape in content, and the escape sequence in source code.

Unicode code pointU+2124
HTML entity (named)ℤ
HTML decimalℤ
HTML hexℤ
CSS contentcontent: "\2124";
JavaScript"\u2124"
Python"\u2124"
Python (by name)"\N{DOUBLE-STRUCK CAPITAL Z}"
Java / C#"\u2124"
LaTeX\mathbb{Z}
UTF-8 bytesE2 84 A4
UTF-162124
URL encoded%E2%84%A4

ℤ vs look-alike characters

These characters look similar to ℤ but have a different meaning and code. Pasting the wrong one can break search, sorting and screen readers.

CharNameWhen to use it
Capital Z
U+005A		The plain capital letter.
Black-Letter Capital Z
U+2128		Black-letter capital Z (Fraktur).

Symbols similar to ℤ

Click to copy, or open a symbol for its codes. See the full math symbols collection.

ℤ character properties

Official Unicode name
DOUBLE-STRUCK CAPITAL Z
Also known as
double-struck z, blackboard bold z, set of integers
Code point
U+2124
Unicode block
Letterlike Symbols (U+2100–U+214F)
General category
Uppercase letter (Lu)
Added in
Unicode 1.1 (1993)
Plane
Basic Multilingual Plane (0)
Emoji
No, it is a text symbol

Frequently asked questions

Why is the set of integers called Z?

From the German word Zahlen, meaning numbers.

Is there an alt code for the integers symbol?

No. ℤ is outside the Windows-1252 and code page 437 character sets, so no Alt + number code produces it. Copy it from this page, type 2124 then Alt + X in Word, or find it in Character Map.

How do I type the integers symbol on a Mac?

There is no single Option shortcut for ℤ on the US layout. Press Control + Command + Space to open the Character Viewer, search for “double-struck capital z” and double-click it, or copy it from this page.

What is the HTML code for the integers symbol?

Use the named entity ℤ or the numeric reference ℤ (hex ℤ). All three display ℤ in every browser.

What is the Unicode for the integers symbol?

ℤ is U+2124, officially named DOUBLE-STRUCK CAPITAL Z, in the Letterlike Symbols block. It has been part of Unicode since version 1.1 (1993).