const int buttonPin=2;
const int ledPin=13;

int buttonState=0;

void setup(){
  pinMode(ledPin,OUTPUT);
  pinMode(buttonPin,INPUT);
}

void loop() {
    buttonState = digitalRead(buttonPin);

  if (buttonState == HIGH){  
      digitalWrite(ledPin, HIGH);
  }
  else{
    digitalWrite(ledPin, LOW);
  }
}