input: Write a function that takes two numbers as input, adds them together, and prints the result. The function should be named `add` and it should accept two parameters `a` and `b` which are both integers.
  assert add(5, 7)
  assert add(10, -3)
  assert add(0, 0)
  assert add(-5, -2)
  assert add(100, 200)
output: def add(a, b):
      print(a + b)