source: CIVL/mods/dev.civl.abc/examples/c/loops.c

int x = 0;
int main() {
  while (x<10) {
    x++;
  }

  x = 42;
  do {
    x--;
  } while (x>0);

  for (int i=0; i<10; i++) {
    x++;
  }
}