C Program to count number of digits in a number

/****************************************************
 * Program to count the number of digits in a number
*****************************************************/

#include<stdio.h> // include stdio.h

int main() 
{
    long int num;
    int count = 0, rem;

    printf("Enter a number: ");
    scanf("%ld", &num);

    while (num != 0) 
    {
        rem = num % 10;  // get the last digit of num
        num = num / 10;  // remove the last digit from num
        count++;         // increment count by 1
    }

    printf("%d", count);

    return 0;
}