Sum of two numbers without using addition operator

class Solution {
    public int getSum(int a, int b) {
     while (b!=0){
        int temp= (a&b)<<1;
         a=a^b;
         b=temp;
     }
        return a;
    }
}
//Recursive
int getSum(int a, int b) {
    return b==0? a:getSum(a^b, (a&b)<<1); //be careful about the terminating condition;
}