int button=2;
int ledPin=LED_BUILTIN;
int buttonState=LOW;
void setup()
{
  Serial.begin(9600);
  pinMode(ledPin,OUTPUT);
  pinMode(button,INPUT);
  digitalWrite(button,HIGH);
}
void loop(){
  buttonState=digitalRead(button);
  Serial.println(buttonState);
if(buttonState==LOW)
{
  digitalWrite(ledPin,HIGH);
  Serial.println("button is pressed");
}
else
{
  digitalWrite(ledPin,LOW);
  Serial.println("button is released");
}
delay(500);
}