Quick Question about "Mod" operator

[HGHST]

I've been searching through the forums and the help file that came with MMF2, but none can tell what the "Mod" operator does in the expression editor to different numbers, they only point out that it is there. I've never used it but can someone tell what it does to numbers and why it is included?

Thanks, Hughster

[DanielRehn]

http://en.wikipedia.org/wiki/Modulo_operation

[James]

It basically divides two numbers and returns the remainder.

[SEELE]

Its especially useful when dealing with 2 or more dimensions.

For example (1D-2D)

let V='1D and W='x width' position' then in 2d

x=V MOD W

y=(v-(V MOD W))/w

[Random]

As a more practical whatever example:

1 mod 3 = 1
2 mod 3 = 2
3 mod 3 = 0
5 mod 3 = 2
8 mod 3 = 2
8 mod 3 = 0

[Werbad]

By practical you mean incorrect?
8 mod 3 = 2

[MechatheSlag]

I think of mod as a circle. Once you've reached the desired end you go back to the start.

[Random]

It's just a shame most mod implementations don't handle negative numbers.. that'd be so much more useful (although I saw some that did before.. not sure in which language though) - especially with rotations.

[Popcorn]

And an even more practical example:

128 seconds:
128 / 60 = 2
128 mod 60 = 8

128 seconds = 2 minutes and 8 seconds

[Dynasoft]

It's just a shame most mod implementations don't handle negative numbers.. that'd be so much more useful (although I saw some that did before.. not sure in which language though) - especially with rotations.

I think it does, but like this:
-128 / 60 = -2
-128 mod 60 = -8

To wrap it positive IIRC you do this:
((number mod limit) + limit) mod limit)