#define Button 12
#define LED 11
int sw;
void setup() {
Serial.begin(9600);
pinMode(Button , INPUT_PULLUP);
Serial.println("click the button :");
}

void loop() {
  sw = digitalRead(Button);
  if(sw == 0)
  {
    digitalWrite(LED,1);
    Serial.println("LED ON");
  }
  else
  {
    digitalWrite(LED,0);
    Serial.println("LED OFF");
  }
  delay(1000);
}