ATmega328 Development Board- Temperature Sensor

const int tempPin = 3; // pin 13 of port P2 connected to LM35 output
int Value;
double milivlt,Cel,Far;
void setup()
{
Serial.begin(9600);
}
void loop()
{
Value = analogRead(tempPin); //read sensor output value
milivlt = (Value / 2048.0) * 3300; // converting it to millivots.
Cel = milivlt * 0.1; // calculating temperature in Celsius
Far = (Cel * 1.8) + 32; // convert from C to Fahrenheit
Serial.print(" Temperature in Celsius = ");
Serial.print(Cel);
Serial.print("*C");
Serial.print("\t Temperature in Fahrenheit = ");
Serial.print(Far);
Serial.println("*F");
delay(2000); //check the temperature every 2 second
}