What ँ means
It nasalizes the vowel, not a separate consonant.
In Vedic Sanskrit, sandhi (sound change between neighboring sounds) could alter or drop a following nasal while leaving the preceding vowel nasalized. Sanskrit manuscript practice did not always distinguish candrabindu from anusvara as consistently as Hindi and Nepali spelling. Anunasika is another name for nasalization.
Don't confuse it with
1Questions people ask
1Why does candrabindu sometimes look like a dot?
It can. An upper vowel sign may leave no room for the crescent, so Hindi may use a plain dot for the same nasalization.
How to type ँ
ँ\0901Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.

