const int buttonPin = 2;  
const int ledPin = 13;    
int buttonState = 0;  
void setup() {
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT_PULLDOWN);
}
void loop() {
  buttonState = digitalRead(buttonPin);
  Serial.print(buttonState);
  Serial.print("  ");
  if (buttonState == HIGH) {
    Serial.println("Pressed");
    digitalWrite(ledPin, HIGH);
  } 
  else {
    Serial.println("Un-Pressed");
    digitalWrite(ledPin, LOW);
  }
}