Minimum Bit Flips to Convert Number

<-E 2220> Minimum Bit Flips to Convert Number

class Solution {
public:
    int minBitFlips(int start, int goal) {
        int value = start ^ goal;
        int count = 0;
        while (value) {
          value = value & value - 1;
          count++;
        }
        return count;
    }
};