1. Let's clarify the question: "what about 0" can refer to different contexts in math. 2. If you're asking about properties of the number 0, here are some key points: - 0 is an integer. - It is the additive identity, meaning for any number $a$, $a + 0 = a$. - Multiplying any number by 0 gives 0: $a \times 0 = 0$. - Division by 0 is undefined: $\frac{a}{0}$ is not valid for any $a$. 3. If your question is different, please specify the context (e.g., equations, limits, functions).