Sinhala Archaic Number Eighty

Eighty, in Sinhala Illakkam.

This is a whole-number sign, not the digit eight repeated. Sinhala Illakkam gives tens their own signs and has no zero placeholder, so 𑇱 carries the value eighty by itself.

Where did Sinhala archaic numerals come from?

The broader system has roots in older Brahmi-like numerals.

Early Sinhala number signs resembling Brahmi appear on stone slabs from Dakkina Vihara, although many inscriptions wrote dates in words. This evidence concerns the older numeral family as a whole.

In 1815, the system appears in the Kandyan Convention and in royal documents and artifacts. Sinhala Illakkam served for everyday calculations and simple numbers. Other Sinhala systems had different jobs: Lith Illakkam for astrology, Swara for numbering palm-leaf manuscript pages, and Katapayadiya for dates and astrological writing.

What does 𑇱 mean when someone sends it?

It still reads as eighty; the glyph alone says nothing about tone.

If someone sends it alone, read it as the number eighty. If the surrounding message does not clarify why, ask them for context.

The notation combines separate digit and magnitude signs. In the documented 388 example, 𑇱 contributes eighty between the hundreds sign and the final eight.