Add two numbers without using arithmetic operators

public static int addIterative(int a, int b)
{
    while (b != 0)
  {
    int carry = (a & b) ; //CARRY is AND of two bits
    a = a ^ b; //SUM of two bits is A XOR B
    b = carry << 1; //shifts carry to 1 bit to calculate sum
  }
    return a;
}