find the “string length” of an int

Question

basically I want to return the number of digits in the int -> values like this:

(int)1 => 1
(int)123 => 3
(int)12345678 => 8

I kno

Answer 1

Use logarithms base 10:

int length = (int)floor(log10((float)number)) + 1; // works for >0