Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    int l_ret_int = 0;
    while(n>0)
    {
        if((n & 0x1) == 1)
        {
            l_ret_int++;
        }
        n = n >> 1u;
    }
    return l_ret_int;
}

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

Solving Approach