count number of set bits c 2b 2b

1//Method 1
2	int count = __builtin_popcount(number);
3//Method 2
4	int count = 0;
5    while (number) {
6        count += number & 1;
7        n >>= 1;
8    }

1int hammingWeight(uint32_t n) {
2    int count = 0;
3    
4    while (n) {
5        n &= (n - 1);
6        count++;
7    }
8    
9    return count;
10}

1//Method 1
2   int count = 0;
3   while (n)
4   {
5        count++;
6        n >>= 1;
7    }
8//Method 2
9	int count = (int)log2(number)+1;