Error: "using obsolete binding" in sketch

Projects Programming
7

Why have you even got i2?
There's no reason not to reuse i

I'm using i2, i3, etc... because each variable is receiving different analog input and driving different pins. Is it possible to reuse i and still maintain separate output?

for (int i=2; i<9; i++)
  {
    digitalWrite(i, LOW);
  }
  for (int i2=9; i2<16; i2++)
  {    
    digitalWrite(i2, LOW); 
  }
  for (int i3=16; i<23; i3++)
  {    
    digitalWrite(i3, LOW); 
  }