func int main() {
  matrix a <3, 3> = [1.1, 2.1, 3.1; 1.0, 2.0, 3.0; 4.1, 4.2, 4.3];
  matrix b<2,3> = [1,2,3;4,5,6];
  matrix c<3> = [1,2,3];
  print(norm2(a));
  print(norm2(b));
  print(norm2(c));
  return 0; 
}