input: Write a function to convert Celsius to Fahrenheit and return the result rounded to two decimal places. If the input temperature is below -273.15 degrees Celsius (absolute zero), return "Invalid temperature". Otherwise, return the converted temperature.
  def celsiusToFahrenheit(temp):
      if temp < -273.15:
          return "Invalid temperature"
      return round((temp * 9/5) + 32, 2)
  
  assert celsiusToFahrenheit(0)==32.0
  assert celsiusToFahrenheit(-273.15)==-459.67
  assert celsiusToFahrenheit(100)==212.0
  assert celsiusToFahrenheit(-300)=="Invalid temperature"
  assert celsiusToFahrenheit(25.5)==77.9
output: def celsiusToFahrenheit(temp):
      if temp < -273.15:
          return "Invalid temperature"
      return round((temp * 9/5) + 32, 2)