How can I count the digits in an integer without a string cast?

Question

I fear there\'s a simple and obvious answer to this question. I need to determine how many digits wide a count of items is, so that I can pad each item number with the m

Answer 1

You can loop through and delete by 10, count the number of times you loop;

int num = 423;
int minimum = 1;
while (num > 10) {
    num = num/10;
    minimum++;
}