public int countEvens(int[] nums) {
  int count = 0;
  for (int n : nums) { // for-each loop
    if (n % 2 == 0) {
      count++;
    }
  }
  return count;
}

public int countEvens(int[] nums) {
  int count = 0;
  for (int i = 0; i < nums.length; i++) {
    int n = nums[i];
    if (n % 2 == 0) {
      count++;
    }
  }
  return count;
}