C# v1 and v2 does not exist

Question related to tolerance. I am making multiple functions to see if I am able to make several
((1.is it called function or definition :thinking:)

Now I try making one using division.
2.Do you think tolerance is necessary :thinking:
The mid between -5 and 5 is 0 but is notated (due to adding tolerance) as -1.25e-8

Lets say I am making a grid, one point coordinate will be (-1.25e-8, -1.25e-8, 0) instead of (0,0,0).
3.How do you deal with that at your job or is not that a problem :thinking:

question7.gh (8.0 KB)