What ℚ means
ℚ is the rational-number set. It contains m/n when m and n are integers and n 0; examples are 1/2 and 3.
Q recalls “quotient.” Chalk writers doubled strokes to mark bold set labels; printers later made matching type. Bourbaki, a group of mathematicians, used italic Q for rationals in 1940s notes.
Part of collections
Don't confuse it with
1
Related characters
4
More like this
16
QLatin Capital Letter QℤDouble-Struck Capital ZℝDouble-Struck Capital R
℺Rotated Capital Q
qLatin Small Letter Q
ℕDouble-Struck Capital NℙDouble-Struck Capital P
𝔮Mathematical Fraktur Small Q
𝕢Mathematical Double-Struck Small Q
℘Script Capital PℛScript Capital R
µMicro Sign
ʹGreek Numeral Sign
ـArabic Tatweel
ーKatakana-Hiragana Prolonged Sound Mark
ꞈModifier Letter Low Circumflex AccentCollections with ℚ
1
How to type or find ℚ
- Also called
- blackboard bold Q · double-struck Q · openface Q
- Search it as
- rational numbers · rationals · mathbb Q · Q symbol
- Shows up in
- Anything that takes text · its shape is whatever your font draws
Windows (Word)
Windows
HTML
ℚCSS
\211ALaTeX
In math mode, use
\mathbb{Q} with amsfonts or amssymb loaded.HTML
Write
ℚ or ℚ as a character reference.Codes and encoding1 code points
HTML decimal
ℚ
HTML hex
ℚ
CSS content
content: "\211A";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%84%9A
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.