input: Write a function to compute the sum of two numbers and store the result in a third variable. The function should take two parameters, `x` and `y`, and return the sum. If the parameters are not provided, the function should use default values of 0. Print the result to the console.
  def compute_sum(x=0, y=0):
      result = x + y
      z = result
      print(z)
      return z
  
  assert compute_sum(5, 8) == 13
  assert compute_sum(0, 0) == 0
  assert compute_sum(10, -10) == 0
  assert compute_sum() == 0
output: def compute_sum(x=0, y=0):
      result = x + y
      z = result
      print(z)
      return z