int button1 = 7;        
int button2 = 8;
int button3 = 9;

void setup() {
  pinMode(button1, INPUT_PULLUP);    
  pinMode(button2, INPUT_PULLUP);
  pinMode(button3, INPUT_PULLUP);
  Serial.begin(9600);
}

void loop() {

 if (digitalRead (button1) == LOW) {
  Serial.println
  ("Nama : Ahmad Soni ");
  delay(1000);
 }else if (digitalRead (button2) == LOW){
  Serial.println
  ("NIM : 230536604380");
  delay(1000);
 }else if(digitalRead (button3) == LOW){
  Serial.println
  ("Prodi : S1 TEKNIK ELEKTRO");
  delay(1000);
 }
  

}