,
Comma
- Unicode
- U+002C
- Category
- Punctuation
- HTML Entity
- ,
- CSS
- \002C
The comma (,) separates parts of a sentence: items in a list, clauses, an introductory phrase. In English numbers it groups thousands (1,000,000), while most of continental Europe, Latin America and Russia use it as the decimal separator (3,14) — a common source of misread prices and broken spreadsheets. It sits low on the baseline; the raised mark of the same shape is the apostrophe or closing quote ’.
On US and UK keyboards the comma has its own key right of M; Shift with the same key gives <. The decimal key on the numeric keypad types a comma when the system region uses a decimal comma. On iPhone the comma is on the 123 page; on Android keyboards such as Gboard it usually sits next to the space bar.
On US and UK keyboards the comma has its own key right of M; Shift with the same key gives <. The decimal key on the numeric keypad types a comma when the system region uses a decimal comma. On iPhone the comma is on the 123 page; on Android keyboards such as Gboard it usually sits next to the space bar.
How to Type
- Windows
- , key (right of M) · Alt+44
- macOS
- , key (right of M)
- Linux
- , key · Ctrl+Shift+U 2c
- HTML
- ,
In Programming
Commas separate function arguments, array and object elements and imported names in nearly every language. JSON forbids a trailing comma after the last element, while JavaScript, Python and Rust allow one. In C and JavaScript the comma operator evaluates both sides and returns the right one; in Python a bare comma builds a tuple (x = 1,). CSV files use it as the field separator, so any field that contains a comma has to be wrapped in quotes.
Tags
comma
comma symbol
comma key
decimal comma
thousands separator
alt 44
keyboard symbol
punctuation
ascii