input: Write a function to calculate the total sum of all elements of a given list. If the list is empty, return 0.
  assert calculate_sum_of_list([1, 2, 3, 4])==10
  assert calculate_sum_of_list([-1, -2, -3, -4])==-10
  assert calculate_sum_of_list([0, 0, 0, 0])==0
  assert calculate_sum_of_list([])==0
output: def calculate_sum_of_list(lst):
      return sum(lst) if lst else 0