#define LED11 22
#define switch11 2
void setup() {
 pinMode(LED11, OUTPUT);
  pinMode(switch11, INPUT_PULLUP);
  Serial.begin(9600);
}

void loop() {
  int buttonstate=digitalRead(switch11);
  if (buttonstate==0)
  {
    digitalWrite(LED11, HIGH);
    Serial.println("switchoff ON, LED ON");
  }
  else if (buttonstate==1)
  {
digitalWrite(LED11, LOW);
Serial.println("switch off,LED off");
  }
 
}