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Yes, zero is a real number. It is not a counting number, but it is an integer, a rational number, and a real number.
not a real number * * * * * Zero is very much a real number. In fact it is the additive identity for the set of real numbers.
Real numbers are all positive numbers except zero.
Wrong! Not only is zero a real number, but it is the additive identity for the set of integers, rational numbers as well as real numbers.
Zero