input: Write a function that computes the sum of two variables and stores the result in a third variable. The function should then print the result. 
  
  def compute_sum(x, y):
      result = x + y
      z = result
      print(z)
  
  assert compute_sum(5, 8)==None
  assert compute_sum(10, 20)==None
  assert compute_sum(-3, 3)==None
  assert compute_sum(0, 0)==None
output: def compute_sum(x, y):
      result = x + y
      z = result
      print(z)