int led=8;
int swi=9;
void setup() 
{
  pinMode(led, OUTPUT);
  pinMode(swi,INPUT_PULLUP);
  Serial.begin(9600);  // put your setup code here, to run once:

}

void loop() 
{
  int status=digitalRead(swi);
  Serial.println(status);

if(status==HIGH)
{
  digitalWrite(led,LOW);
  Serial.println("led is off");
}
else {
  digitalWrite(led, HIGH);
  Serial.println("led is on");
}
}