input: Write a function to construct a Python program that takes in the size of a jagged array and prints it (without any values). If the array size is given as 4, the function should return a jagged array with 4 empty sub-arrays.
  assert print_jagged_array(4) == [[], [], [], []]
  assert print_jagged_array(0) == []
  assert print_jagged_array(2) == [[], []]
output: def print_jagged_array(size):
      return [[] for _ in range(size)]