//Practice exercise: Using a switch

int ledPin = D2;

int switchPin = D3;


void setup() {

    pinMode(ledPin,OUTPUT); //set pin as output
    
    pinMode(switchPin, INPUT_PULLUP); //set pin as imput

}

void loop() {

    int switchState = digitalRead(switchPin);
    
    if(switchState == LOW)
    {
        digitalWrite(ledPin,HIGH); //turn the led on
        
    }else{
        digitalWrite(ledPin,LOW); //otherwise turn the led off
    }
}