Basic On/Off switch code

intledPin = 14;
intbuttonPin = 34;


boolbuttonState;
boolbuttonDown;
boolledOn;


voidsetup()
{
pinMode(buttonPin, INPUT);
pinMode(ledPin, OUTPUT);
}


voidloop()
{
  // Check the status of the loop (0 = closed)
buttonState = digitalRead(buttonPin);


  // If the loop is closed
if(!buttonState)
  {
    // And if the loop wasn't already closed
if(buttonDown == false)
    {
      // Remember that the loop is closed, change the LED status to the opposite, output the LED status
buttonDown = true;
ledOn = !ledOn;
digitalWrite(ledPin, ledOn);
    }


  }
  // When the loop opens again, forget that the loop is closed
else
  {
buttonDown = false;
  }


delay(100);
}