input: Write a python function to check if a temperature is within a specified range.
  assert temperature_in_range(25, 20, 30) == "Temperature is in range"
  assert temperature_in_range(15, 20, 30) == "Temperature is out of range"
  assert temperature_in_range(30, 20, 30) == "Temperature is in range"
output: def temperature_in_range(temp, lower, upper):
      if lower <= temp <= upper:
          return "Temperature is in range"
      else:
          return "Temperature is out of range"