int led=13;
int sw=2;

int State = 0;

void setup() {
  pinMode(sw, INPUT);
  pinMode(led, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  State = digitalRead(sw);
  if (State == HIGH) {
    digitalWrite(13, HIGH);
    Serial.println( "led is on");
  } else if (State == LOW) {
    digitalWrite(13, LOW);
    Serial.println("led is off");
  }
  delay(2000);
}