input: Write a function to calculate the sum of squares of all numbers provided in an array of integers.
  def sum_squares(arr):
      total = 0
      for num in arr:
          total += num ** 2
      return total
  
  assert sum_squares([2, 3, 4]) == 29
  assert sum_squares([1, 1, 1]) == 3
  assert sum_squares([0, 0, 0]) == 0
  assert sum_squares([-1, -2, -3]) == 14
  assert sum_squares([]) == 0
output: def sum_squares(arr):
      total = 0
      for num in arr:
          total += num ** 2
      return total