Double Vertical Line
Part of Punctuation and Typography Marks
Double Vertical Line has no standard Windows Alt code. Copy the character directly, or use its HTML entity or Unicode value instead.
- Alt code
- None
- HTML entity
- ‖
- Unicode
- U+2016
About this symbol
The double vertical line has several jobs in maths: ‖v‖ is the length, or norm, of a vector v, and in geometry it can mean “is parallel to”. In printing it is one of the traditional marks for footnotes, after the asterisk, dagger, double dagger and section sign.
Unicode facts
- Official name
- DOUBLE VERTICAL LINE
- Type
- Punctuation
- Unicode block
- General Punctuation
- Added in
- Unicode 1.1 (1993)
- Unicode notes
- Used in pairs to indicate norm of a matrix
Click the symbol or any value at the top of the page to copy it. See the full Punctuation and Typography Marks chart for related characters.