Question

I have an integer and need to find out how many digits are in it.

Answer 1

A little tricky to handle negative numbers and the case where the input is zero:

int length(int n)
{
   int len = 0;
   if (n < 0) { len = 1; n = -n; }
   while (n > 9) {
        n /= 10;
        len++;
   }
   return len+1;
}