Other ID Start

Unicode Version 18.0

Other ID Start is a character classification that permits certain symbols to act as the starting character of an identifier, even though they are not normally classified as letters or ideographs. This category includes specific characters, such as certain mathematical symbols or punctuation marks, that have been explicitly reserved for this role by the standard’s rules. The purpose is to allow these otherwise non-alphabetic glyphs to begin variable names, function names, or other user-defined identifiers in programming languages and markup systems that choose to adopt this broader definition. It complements the standard “ID Start” set, which covers letters and ideographs, by extending identifier syntax to a small, curated list of additional code points, ensuring consistency across different implementations that rely on this extended set.

Yes
Abbr
Y
Count
6

Yes is granted to characters that can start identifiers in programming, beyond typical letters, like certain symbols.
No
Abbr
N
Count
310335

No is false, meaning the character cannot begin an identifier, unlike characters with a true value.