input: Write a function that takes two numbers as input and prints their sum. The function should be named `add`, and it should take two parameters: `a` and `b`. The function should compute the sum of `a` and `b` and then print the result.
  
  assert add(5, 7) == None
  assert add(10, 20) == None
  assert add(-3, 3) == None
output: def add(a, b):
      print(a + b)