Writing $0$ with $6$ significant figures concisely

Question

I have some calculations that result in exactly $0$, calculated to 6 significant figures. However, I do not want to write $0.00000$ for each of these calculations, as it makes it look messier. How can I write it more concisely, while still retaining the number of significant figures?

Answer 1

If all the rest of your numbers will have the decimal point in them, consider writing it as simply $0$ and provide a reference note somewhere that $0$ is $0.00000$ throughout your paper/thesis/work. You've referred to this as being "exact" in the sense that if it's not exactly zero then it differs only in an $\varepsilon<10^{-6}$ so it's reasonable to use the "exact" value $0$.

This also has the minor advantage that your "exact" $0$s will stand out in tables and lists.