text: // Hi, I'm Yanzhan. For more algothmic problems, visit my Youtube Channel (Yanzhan Yang's Youtube Channel) : https://www.youtube.com/channel/UCDkz-__gl3frqLexukpG0DA?view_as=subscriber or my Twitter Account (Yanzhan Yang's Twitter) : https://twitter.com/YangYanzhan or my GitHub HomePage (Yanzhan Yang's GitHub HomePage) : https://yanzhan.site .
  // For this specific algothmic problem, visit my Youtube Video :  .
  // It's fascinating to solve algothmic problems, follow Yanzhan to learn more!
  // Blog URL for this problem: https://yanzhan.site/codesignal/number-of-even-digits.html .
  
  int numberOfEvenDigits(int n) {
      if (n == 0) {
          return 1;
      }
      int res = 0;
      while (n > 0) {
          int digit = n % 10;
          if (digit % 2 == 0) {
              res++;
          }
          n /= 10;
      }
      return res;
  }
  