Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here
    int ctr;
    for (int i=0; i < ((sizeof(int)*8)) ; i++) if (n & (1 << i)) ctr++;
    return ctr;
}

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

Solving Approach