// lab4 Arduino_Switch_1LED

#define LED 13
#define SW1  4
#define pressed LOW
void setup()
{
  // put your setup code here, to run once
  Serial.begin(9600);
  pinMode(LED, OUTPUT);
  pinMode(SW1, INPUT_PULLUP);
}

void loop()
{
  // put your main code here, to run repratedly:
   int value = digitalRead(SW1);
  if(value == pressed)
{
Serial.println("pressed Switch");
delay(10);
digitalWrite(LED, HIGH);
}
else
{
  digitalWrite(LED, LOW);
}
}