const int pinA0 = A0;

void setup() {
  Serial.begin(9600);
}

void loop() {
  
  int analogValue = analogRead(pinA0);

  float voltage = analogValue * (5.0 / 1023.0);

  //Serial.print("AnalogValue : "); Serial.println(analogValue);
  Serial.print("Voltage     : "); Serial.println(voltage);

  delay(200);

}