Error about dart's two-dimensional array?

void main() {
  int pid = 12;
  int data1 = [12][1];
  for (int i = 0; i < pid; i++) {
    data1[i][0] = 0; // This is wrong
  }
}

Error message: The operator ‘[]’ isn’t defined for the type ‘int’.Try defining the operator ‘[]’
// This is not wrong in other languages,Please help answer thank you.
//Why doesn’t this expression work? How to write it correctly

>Solution :

Here is the code with correct syntax.

void main() {
  int pid = 12;
  List<List<int>> data1 = List.generate(pid, (_) => [0, 0]); // Initialize a 2D list

  for (int i = 0; i < pid; i++) {
    data1[i][0] = 0; // Assign 0 to the first element of each sublist
  }
}