Count Number of Digits in an Integer.c

#include <stdio.h>
int main()
{
    long long n;
    int count=0;
    
    printf("Enter an integer: ");
    scanf("%lld", &n);
    
    while(n!=0)
    {
        n = n/10;
        ++count;
    }
    
    printf("Number of digits: %d",count);
    
    return 0;
}


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output--

Enter an integer: 15
Number of digits: 2