Arduino button sample

sample.cpp

int buttonA = 8;
int buttonB = 9;
int buttonEB = 7;
int speed = 9600;

  
void setup()
{
  Serial.begin(speed);
  pinMode(buttonA,INPUT_PULLUP);
  pinMode(buttonB,INPUT_PULLUP);
  pinMode(buttonEB,INPUT_PULLUP);
}

void loop()
{
  if(digitalRead(buttonA) == LOW){
    Serial.write("AKE\n");
  }
  if(digitalRead(buttonB) == LOW){
    Serial.write("SHIME\n");
  }
  if(digitalRead(buttonEB) == LOW){
    Serial.write("EB\n");
  }  
}