This character is a Other Punctuation and is commonly used, that is, in no specific script. The character is also known as the use as decimal or thousands separator is locale dependent.
The glyph is not a composition. Its East Asian Width is narrow. In bidirectional text it is written as number separator according to the number it separates. When changing direction it is not mirrored. It will not end a sentence. U+002C prohibits a line break after it, and before it, too, if preceded by a number. The glyph can be confused with 16 other glyphs.
The CLDR project calls this character “comma” for use in screen reading software.
The Wikipedia has the following information about this codepoint:
The comma, is a punctuation mark that appears in several variants in different languages. Some typefaces render it as a small line, slightly curved or straight, but inclined from the vertical, others give it the appearance of a miniature filled-in figure 9 placed on the baseline. In many typefaces it is the same shape as an apostrophe or single closing quotation mark ’.
The comma is used in many contexts and languages, mainly to separate parts of a sentence such as clauses, and items in lists mainly when there are three or more items listed. The word comma comes from the Greek κόμμα (kómma), which originally meant a cut-off piece, specifically in grammar, a short clause.
A comma-shaped mark is used as a diacritic in several writing systems and is considered distinct from the cedilla. In Byzantine and modern copies of Ancient Greek, the "rough" and "smooth breathings" (ἁ, ἀ) appear above the letter. In Latvian, Romanian, and Livonian, the comma diacritic appears below the letter, as in ș.
In spoken language, a common rule of thumb is that the function of a comma is generally performed by a pause.
In this article,⟨x⟩denotes a grapheme (writing) and /x/ denotes a phoneme (sound).
Representations
System
Representation
Nº
44
UTF-8
2C
UTF-16
00 2C
UTF-32
00 00 00 2C
URL-Quoted
%2C
HTML hex reference
,
HTML named entity
,
alias
the use as decimal or thousands separator is locale dependent