input: Write a function to calculate the square root of a user-defined positive number. The function should return the square root of the number.
  assert calculate_square_root(100)==10.0
  assert calculate_square_root(25)==5.0
  assert calculate_square_root(2)==1.4142135623730951
  assert calculate_square_root(1)==1.0
  assert calculate_square_root(0)==0.0
output: def calculate_square_root(number):
      return number ** 0.5