int LED = 2;
int pushButton_PULLUP = 8;
int pushButton = 7;              //inpute mode with outside pull up
int pushButton_withoutdb = 3;   //Input mode with No debounce
int pushButton_pd = 4;              //inpute mode with outside pull down



//bool state = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(pushButton_PULLUP, INPUT_PULLUP);
  pinMode(pushButton, INPUT);
  pinMode(pushButton_withoutdb, INPUT);
  pinMode(pushButton_pd, INPUT);



  digitalWrite(pushButton_withoutdb, HIGH);

  pinMode(LED, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if(digitalRead(pushButton_PULLUP) == LOW)
  {
    digitalWrite(LED, HIGH);
  }
  else
  {
    digitalWrite(LED, LOW);
  }
  /* --------------------------------------------- */
  if(digitalRead(pushButton) == LOW)
  {
    digitalWrite(LED, HIGH);
  }
  else
  {
    digitalWrite(LED, LOW);
  }
  /* --------------------------------------------- */
  if(digitalRead(pushButton_withoutdb) == LOW)
  {
    digitalWrite(LED, HIGH);
  }
  else
  {
    digitalWrite(LED, LOW);
  }
  /* --------------------------------------------- */
  if(digitalRead(pushButton_pd) == HIGH)
  {
    digitalWrite(LED, HIGH);
  }
  else
  {
    digitalWrite(LED, LOW);
  }

}