input: Write a function to calculate the square root of a user-defined positive number. If the input number is negative, raise a ValueError.
  assert calculate_square_root(100)==10.0
  assert calculate_square_root(25)==5.0
  try:
      calculate_square_root(-16)
  except ValueError:
      pass
  assert calculate_square_root(0)==0.0
output: def calculate_square_root(number):
      if number < 0:
          raise ValueError("Input number must be non-negative")
      return number ** 0.5