//IOT PR - 3 
//Interfacing of Switch with Arduino Uno
int buttonstate = 0;
int ledpin = 9;
void setup ()
{
  pinMode(2,INPUT); // declare the switch pin as input pin 
  pinMode(ledpin, OUTPUT);
}
void loop()
{
  //read the state of pushbutton value
  buttonstate = digitalRead(2);
  //check if pushbutton is pressed. if it is the 
  //buttonstate is high
  if (buttonstate == HIGH) {
    //turn LED on 
    digitalWrite(ledpin , HIGH);
  } else {
    //turn LED off
    digitalWrite(ledpin, LOW);
  }
  delay(10); //Delay a little bit to improve performance 

}