input: Write a function to calculate the sum of squares of all numbers provided in an array of integers. The function should return the total sum of squares. If the given array is empty, the function should return 0.
  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, 2, 1])==6
  assert sum_squares([0, 0, 0])==0
  assert sum_squares([5])==25
  assert sum_squares([])==0
output: def sum_squares(arr):
      total = 0
      for num in arr:
          total += num ** 2
      return total