public class Solution {
    public int countDigits(int n) {
        int digitos = 0;

        if(n < 0) {
            n = Math.abs(n);
        }

        if(n == 0) {
            return 1;
        }

        while(n > 0) {
            n /= 10;
            digitos++;
        }
        return digitos;
    }
}