″
Double Prime
- Unicode
- U+2033
- Category
- Math
- HTML Entity
- ″
- CSS
- \2033
The double prime symbol (″) is a typographical mark primarily used in mathematics and science to denote inches, seconds of an angle, or seconds of time. It is also heavily used in calculus to indicate the second derivative of a function, such as f″(x). Visually distinct from standard double quotation marks, it features a slight rightward slant and should be specifically used in technical typesetting for accurate formatting.
How to Type
- Windows
- Type 2033 then Alt+X in Word, or Win+. then search 'double prime'
- macOS
- Control+Command+Space then search 'double prime'
- Linux
- Ctrl+Shift+U then 2033
- HTML
- ″ or ″
In Programming
While generally avoided in standard programming string syntax (which requires basic ASCII quotes), the double prime is essential in LaTeX and math rendering libraries to display physical units and mathematical derivatives accurately.
Tags
angular seconds
arcseconds
calculus notation
coordinate seconds
double prime
double prime mark
f double prime
f''
imperial measurement
inch symbol
inches
mathematics
notation
second derivative
seconds