int LDRSensor = 2;
void setup()
{
  pinMode (LDRSensor, INPUT);
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin (9600);
}
void loop()
{
  int Sensordata = digitalRead (LDRSensor);
  if (Sensordata == HIGH) {
    Serial.print("Room is Dark");
    Serial.println();
    Serial.print("Sensor value:");
    Serial.println(Sensordata);
    Serial.println();
    digitalWrite(LED_BUILTIN, HIGH);
    Serial.print("Light is Switched ON");
    Serial.println();
  }
  else {
    Serial.print("Room is Bright");
    Serial.println();
    Serial.print("Sensor value:");
    Serial.println(Sensordata);
    Serial.println();
    digitalWrite(LED_BUILTIN, LOW);
    Serial.print("Light is Switched OFF");
    Serial.println();
  }
  delay(1000);
}