Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {
    int counts= 0;
    while (n > 0) {
        if (n % 2) counts++;
        n= n >> 1;
    }
    return counts;
}

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