int LDRPin= 5 ;                                  //..........

void setup(void) {
  Serial.begin(9600);
}

void loop(void) {
  int LDRReading = analogRead(LDRPin);  //..........
  Serial.print("Analog reading = ");          //..........
  Serial.println(LDRReading);                 //..........
  delay(500);                                //..........
}