input: Write a function to calculate the square root of a user-defined positive number. If the number is negative, raise a ValueError.
  def calculate_square_root(n):
      if n < 0:
          raise ValueError("The number must be positive")
      import math
      return math.sqrt(n)
  
  assert calculate_square_root(100) == 10.0
  assert calculate_square_root(25) == 5.0
  assert calculate_square_root(169) == 13.0
  assert calculate_square_root(0) == 0.0
  try:
      calculate_square_root(-100)
      assert False
  except ValueError:
      assert True
output: def calculate_square_root(n):
      if n < 0:
          raise ValueError("The number must be positive")
      import math
      return math.sqrt(n)