input: Write a function to create a dictionary where the keys are numbers between 1 and 15 (both included) and the values are the square of the keys. Return the dictionary.
  def create_squares_dict():
      d = {}
      for i in range(1, 16):
          d[i] = i**2
      return d
  
  assert create_squares_dict() == {1: 1, 2: 4, 3: 9, 4: 16, 5: 25, 6: 36, 7: 49, 8: 64, 9: 81, 10: 100, 11: 121, 12: 144, 13: 169, 14: 196, 15: 225}
output: def create_squares_dict():
      d = {}
      for i in range(1, 16):
          d[i] = i**2
      return d