// C++ code
// Author: Mancs
// Topic: Push button

int pushButton = 3;
int redLED = 2;
int buttonState;

void setup()
{
  pinMode(pushButton, INPUT_PULLUP);
  pinMode(redLED, OUTPUT);
}

void loop()
{
  // data 1 or 0 from digital pins
  buttonState = digitalRead(pushButton);
  
  if (buttonState == LOW){
    redLight(redLED);
  } else {
    redTurnOff(redLED);
  }
}

void redLight(int pin){
  digitalWrite(pin, HIGH);
}

void redTurnOff(int pin){
  digitalWrite(pin, LOW);
}