====== arithmetic operators ======

* (multiplicator) \\
/ (dividing) \\
% (modulo) ... e.g. rest of a number\\
+ -\\
++ --\\

==== example ====
<code c>
#include <stdio.h>

int main (void) {
int x,y;
x=2;

x = x+1; // = 3
x = x++; // = 3
x = ++x; // = 3
x = +=x; // = 4
// and so on

/*
for the wired case of 
x = x+++x;
or 
x=x---x; 

that means 
x = x++ +x; 
and 
x = x-- -x;


also possible is

x = x- --x;
*/
}

</code>