// Button2
/* Turn onboard “L” LED OFF by pressing push button */

// USING INTERNAL PULL-UP RESISTOR, Pin #3:

 int pbPin = 3;
 int ledPin = 13;
 int pbState = 0;  
       
void setup( ) {
  	pinMode(ledPin, OUTPUT);  
	pinMode(pbPin, INPUT);
		digitalWrite(pbPin, OUTPUT);
 }

void loop( ) {
  pbState = digitalRead(pbPin);
  	if (pbState == HIGH) {    
		digitalWrite(ledPin, HIGH); }
  	else {
    		digitalWrite(ledPin, LOW);    }
 }