Using the Pmod BTN with Arduino Uno

*************************************************************************
* Description: Pmod_BTN
* The state of the push button will be show in the serial monitor.
*
* Material
* 1. Arduino Uno
* 2. Module Pmod BTN
*
************************************************************************/

boolean bp;
int index=0;
void setup()
{
Serial.begin(9600); // initialization of the serial monitor
for (int i=2; i<=5; i++) // configuration pins 2 to 5 in input
{
pinMode(i,INPUT);
 }
}

void loop()
{
for(int i=2; i<=5; i++) // read state of push buttons
 {
bp=digitalRead(i);
delay(40); // Debounce
if(bp==HIGH)
  {
Serial.print("Le bouton BTN");
index=i-2; // index calculation push buton
Serial.print(index);
Serial.println(" est actif.");
  }
 }
}