#define Button 11
#define LED 12
int sw;

void setup()
{
  Serial.begin(9600);
  pinMode(LED, OUTPUT);
  pinMode(Button, INPUT_PULLUP);
  Serial.println("Click the button:");
}

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