Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here
    int val = 0 ;
    int bit;
    for ( int i =0; i < 32; i++){
        bit = ( n >> i) & 1;
        if ( bit == 1){
            val++;
        }
        
    }
    return val;
}

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