C programming, Calculate the total count of digits in a whole number.

#include <stdio.h>

int main() {

  long long n;

  int count = 0;

  printf("Enter an integer: ");

  scanf("%lld", &n); 

  do {

    n /= 10;

    ++count;

  } while (n != 0);

  printf("Number of digits: %d", count);

}