void setup () {
Serial.begin (9600);
Serial.println ("Selamat datang di program PENJUMLAHAN DUA ANGKA");
}

void loop () {

float a; 
float b;
float hasil;
Serial.print ("masukkan nilai A = ");
while(Serial.available () == 0) {}
delay(4000);
a= Serial.parseFloat ();
Serial.println (a);

Serial.print ("masukkan nilai B = ");
while (Serial.available() == 0) {}
delay(4000);
b = Serial.parseFloat ();
Serial.println (b);

hasil = a+b;
Serial.print ("Hasil penjumlahan =");
Serial.println (hasil);
Serial.println("\n");
delay(2000);
}