2 positional arguments expected, but 0 found

Can anyone please help me? I don’t understand why my code is giving an error.

int add (int n1, int n2){
  
  n1 + n2;
  
}

void main() {
  
 int step1Result = add(n1: 5, n2: 9);
  
  print(step1Result);
 
  
}

>Solution :

You’ve crated positioned constructor but passing data as named constructor.

try like

  int step1Result = add(  5, 9);

Or to create positioned constructor

int add({required int n1, required int n2}) {
  return n1 + n2;
}

void main() {
  int step1Result = add(n1: 5, n2: 9);

  print(step1Result);
}

Check more about using-constructors