const int buttonPin = 2;

const int ledPin =

13;

int buttonState = 0;

void setup() {

pinMode(ledPin, OUTPUT);

pinMode(buttonPin, INPUT);

}

void loop(){

buttonState = digitalRead(buttonPin);

if (buttonState == HIGH) {

digitalWrite(ledPin, HIGH);

}

else {

digitalWrite(ledPin, LOW);

}

}

Make sure you change 'buttonPin' and 'ledPin' according to how you've wired them,

the example assumes they're connected to digital pins 2 and 13, respectively.