Arduino Light Senser Using LDR

1void setup() {
2  Serial.begin(9600); // Start Serial.
3  pinMode(13,  OUTPUT);
4}
5
6void loop() {
7  int A = analogRead(A0);
8  Serial.println(A);//  Display serial results in serial monitor.
9  if (A < 100 ) {   // Change 100 to  the number depending on the light in your area.
10    digitalWrite(13, HIGH);
11  }
12
13  else {
14    digitalWrite(13, LOW);
15  }
16
17
18}