Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here
    int cnt = 0;
    for(unsigned int i = 0; i<32; i++){
        if((n>>i) & 0x01)   cnt++;
    }
    return cnt;
}

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

Solving Approach

Check each bit is 1 by anding with 1 after the number is right shifted i times while iterating through a loop running 32 times. increment count if the bit is 1.