bitwise count total set bits

1countBits = (n) => n.toString(2).split("0").join("").length;

1//WAP to find setbits (total 1's in binary ex. n= 5 => 101 => 2 setbits
2int count{}, num{};
3  cin >> num;
4
5  while (num > 0) {
6    count = count + (num & 1); // num&1 => it gives either 0 or 1
7    num = num >> 1;	// bitwise rightshift 
8  }
9
10	 cout << count; //count is our total setbits
11
12