Editing 9 (section)

==Evolution of the Hindu–Arabic digit==
{{See also|Hindu–Arabic numeral system}}{{Verification section|date=September 2024}}[[File:Evo9glyph.svg|200px|left]]
Circa 300 BC, as part of the [[Brahmi numerals]], various Indians wrote a digit 9 similar in shape to the modern closing [[question mark]] without the bottom dot. The Kshatrapa, Andhra and Gupta started curving the bottom vertical line coming up with a {{num|3}}-look-alike.<ref>{{Cite web |last=Lippman |first=David |date=2021-07-12 |title=6.0.2: The Hindu-Arabic Number System |url=https://math.libretexts.org/Courses/Cosumnes_River_College/Math_300%3A_Mathematical_Ideas_Textbook_(Muranaka)/06%3A_Miscellaneous_Extra_Topics/6.00%3A_Historical_Counting_Systems/6.0.02%3A_The_Hindu-Arabic_Number_System |access-date=2024-03-31 |website=Mathematics LibreTexts |language=en}}</ref> How the numbers got to their Gupta form is open to considerable debate. The Nagari continued the bottom stroke to make a circle and enclose the 3-look-alike, in much the same way that the sign @ encircles a lowercase ''a''. As time went on, the enclosing circle became bigger and its line continued beyond the circle downwards, as the 3-look-alike became smaller. Soon, all that was left of the 3-look-alike was a squiggle. The Arabs simply connected that squiggle to the downward stroke at the middle and subsequent European change was purely cosmetic.

While the shape of the glyph for the digit 9 has an [[Ascender (typography)|ascender]] in most modern [[typeface]]s, in typefaces with [[text figures]] the character usually has a [[descender]], as, for example, in [[File:TextFigs196.png|45px]].

The form of the number nine (9) could possibly derived from the Arabic letter ''[[و|waw]]'', in which its isolated form (و) resembles the number 9.

[[File:Seven-segment 9.svg|20px|left]]
The modern digit resembles an inverted ''6''. To disambiguate the two on objects and labels that can be inverted, they are often underlined. It is sometimes handwritten with two strokes and a straight stem, resembling a raised lower-case letter '''q''', which distinguishes it from the 6. Similarly, in [[seven-segment display]], the number 9 can be constructed either with a hook at the end of its stem or without one. Most [[liquid crystal display|LCD]] calculators use the former, but some [[vacuum fluorescent display|VFD]] models use the latter.