-2%10=8 can someone explain this equation with real life example and can you use this expression in programming

Question

Just stumbled across this equation. Curious about how should i use this expression in a program

Answer 1

Generally, for
x%m, where x<0, x%m=m-(-x%m)

Answer 2

You know -10/10=1, so -10%10=0
Now, apply this:
-2%10=(-10+8)%10=0+8%10=8

Answer 3

Yes.
Precisely what I lengthily explained

Answer 4

(-10+8)%10=-2%10
This one right

Answer 5

Thanks now understand it