#define led11 22
#define switch 2

void setup() {

  pinMode(switch, INPUT);
  pinMode(led11, OUTPUT);
  Serial.begin(9600);
}

void loop() {
int buttonstate=digitalRead(switch);
if (buttonstate==0){
  digitalWrite(led11, HIGH);
  Serial.println("switch on ,led on");
 }
else{
  digitalWrite(led11, LOW);
  Serial.println("switch off ,led off");
}
}