ArduinoBasics - 5. Photoresistor controlling LED light

int light;
int ledPin = 11;

void setup()
{
  Serial.begin(9600);
  pinMode(A0, INPUT);
  pinMode(ledPin, OUTPUT);
}

void loop()
{
  light = analogRead(A0);
  Serial.print("Light is = ");
  Serial.println(light);
  // Light can take values from 54 to 974
  light = map(light, 0, 1023, 0, 255);
  Serial.print("Regularised light is = ");
  Serial.println(light);
  analogWrite(ledPin, light);
  delay(200);
}