input: Write a function to calculate the total sum of all elements in a given list. The function should take a list as input and return the sum of its elements. If the list is empty, the function should return 0.
  assert calculate_sum_of_list([1, 2, 3, 4])==10
  assert calculate_sum_of_list([-1, 0, 1])==0
  assert calculate_sum_of_list([])==0
  assert calculate_sum_of_list([5, 5, 5, 5])==20
output: def calculate_sum_of_list(lst):
      return sum(lst) if lst else 0