What ৮ means
The Bangla 8 writes the value eight.
In Bangla, ১৮ is eighteen and ৮০ is eighty; Assamese uses the same digit set.
Gupta numerals developed from Brahmi numerals, documented by the middle of the third century BCE. Bengal’s Gupta-period copper-plate records used numerals for era dates; Pala-period plates recorded rulers’ regnal years (years of their reign). Sena-period plates and manuscripts show forms close to modern Bangla numerals, but the exact development is hard to trace. The origins of individual Brahmi numeral forms remain unproved.
Don't confuse it with
1Questions people ask
1Why does ৮ show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type ৮
৮\09EECodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.