Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here
    int count = 0;
    while(n){
        count += (n&1);
        n >>= 1;
    }
    return count;
}

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

Solving Approach

To count the bits, we can use & operator to check the LSB and keep shifting the value