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it was used when it was used haha
aryabhatt
in India they first cam up with then number 0 and was used probly in the 1500
THe Gupta Empire
the actual number zero (0) was first used in India circa the 9th century BCE. The concept of zero was known earlier (arguably as far back as the Babylonians), but it was not used in calculations and not treated as a true number.