input: Write a function to calculate the square root of a user-defined positive number. The function should take a number as input and return its square root. If the number is not positive, raise a ValueError.
  assert calculate_square_root(100) == 10.0
  assert calculate_square_root(25) == 5.0
  assert calculate_square_root(16) == 4.0
  assert calculate_square_root(9) == 3.0
  assert calculate_square_root(0) == 0.0
output: def calculate_square_root(number):
      if number < 0:
          raise ValueError("Number must be positive")
      return number ** 0.5