#define LED 27
#define BUTTON 13

int buttonState=0;

void setup() {
  Serial.begin(115200);
  pinMode(LED, OUTPUT);
  pinMode(BUTTON, INPUT_PULLUP);
  digitalWrite(LED,LOW);
}

void loop() {
  buttonState = digitalRead(BUTTON);
  delay(50);
  if (buttonState == LOW)
  {
    Serial.println("Switch is ON");
    digitalWrite(LED,HIGH);
  }
  if (buttonState == HIGH)
  {
    Serial.println("Switch is OFF");
    digitalWrite(LED,LOW);
  }
}