input: Write a function named generate_random_number that generates a random number in the range [0, 10). The function should use the built-in Python module random to produce the output. If the function is called without any input, it should return the randomly generated number.
  assert generate_random_number() in [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
output: import random
  
  def generate_random_number():
      return random.randint(0, 9)