public int sum2(int[] nums) {
  if (nums.length == 0) {
    return 0;
  }
  else if (nums.length == 1) {
    return nums[0];
  }
  else {
    return nums[0] + nums[1];
  }
}

public int sum2(int[] nums) {
  int sum = 0;
  if (nums.length > 0) {
    sum += nums[0];
  }
  if (nums.length > 1) {
    sum += nums[1];
  }
  return sum;
}