input: Write a function to calculate the square root of a user-defined positive number. If the number is negative or zero, return an error message. If the number is positive, return the square root of the number. If the input is not a number, return an error message.
  assert square_root_of_number(100) == "Square root of 100 is 10.0"
  assert square_root_of_number(-10) == "Error: Number must be positive"
  assert square_root_of_number(0) == "Error: Number must be positive"
  assert square_root_of_number("abc") == "Error: Input must be a number"
output: def square_root_of_number(num):
      if isinstance(num, (int, float)):
          if num > 0:
              return f"Square root of {num} is {num ** 0.5}"
          else:
              return "Error: Number must be positive"
      else:
          return "Error: Input must be a number"