Why is the output going to be 3?

[iamyiyaj]

Sorry for the many questions. I am studying for my final in a week and i am going over my midterm.
So on the midterm the question was what would be the output if user input was 10. I put 11 cause i thought 100 divided by 10 was 10 and then plus plus is 11. But the answer is 3 and i have no clue how.

  #include <iostream>
using namespace std;
int main()
{
 int number;
 int counter=0;
 cout<<"Enter an integer\n";
 cin>>number;
 while (number>0)
 {number=number/10;
 counter++;}
 
 cout<< "The counter for your number is " << counter<< endl;
    
        return 0;
}

[Peter87]

Note that it outputs the counter and not the number. It is essentially asking you how many times the loop will run.