easy
A number is an imaginary representation of the amount of "things" (be it phisical objects, ideas, concept and all that stuff)
zero is the imaginary representation that indicates there is no amount of "things"
just as -1 is the imaginary representation that indicates the lack of 1 "thing"
so yeah, zero is a number
A number is an imaginary representation of the amount of "things" (be it phisical objects, ideas, concept and all that stuff)
zero is the imaginary representation that indicates there is no amount of "things"
just as -1 is the imaginary representation that indicates the lack of 1 "thing"
so yeah, zero is a number