Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    int count = 0;

    for(int i = 0; i < 32; i++)
    {
        int mask = 1 << i;
        if((n & mask) != 0) {
            count++;
        }
    }

    return count;
}

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

Solving Approach