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