30. Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {

    int count = 0;

    while(n != 0)
    {
        count = count + (n & 1);

        n = n >> 1;
        

    }

    return count;
}

int main() {
    int n;
    scanf("%d", &n);
    printf("%d", countSetBits(n));
    return 0;
}