main :: () -> void {
  a := f(b = 4,2);
  if a == 0
    print_u64 10;
  else if a == 1
    print_u64 11;
  else if a == 2
    print_u64 12;
  else if a == 3
    print_u64 13;
  else
    print_u64 14;
};

f :: (a:u64,b:u64)->u64{
  return b-a;
};