arithmetic operators

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

#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;
*/
}