%
 

How exactly do you use %? What is it used for?

=X

Basically, % divides by the number behind percent, but leaves the part which can't be divided into a whole number.

3%2=1
500%5=0

What is it useful for?

It's used in clocks (only thing I've seen it in) and it tells the var/string what the limit is and when to go back to 0
like:
blah= blah2%60;
when it reaches 60, it will reset back to 0
[EDIT] That's what I think it is for, I may be wrong =/ [/EDIT]

In certain for loops, E.G.

NPC Code:

---

if (created||timeout) {

  for (this.i=0;this.i<3;this.i++) if (keydown(this.i)){

    this.selected=(this.selected+vecx(this.i))%weapons  count;

  }

  timeout=0.05;

}

---

Would mean that even if you are selecting your last weapon it'd reset back to the first one if you push right while on that weapon.
I also used it for the online time system Munkee requested.

its used for things like when you want to find the left over value of something...

like you have 38 apples and this guy takes 35 apples if you say something like

currentapples%35 would = 3

[screen_name says:]

what if you do this

73 % 35 = 3 apples left !@!@!?!@

so you could use that formula

you would just have to subtract

73 - 35 = 38 apples left, ahh more like it