#define an A0
int value=0;
float volts=0;
void setup() {
  Serial.begin(9600);
  pinMode(an , INPUT); // Arduino Knows that A0 is only INPUT


}

void loop() {
  for (int i=0; i<10; i++)
  {
    value += analogRead(an);
    delay(50);

  }
  value = value/10;
  volts = (5.0/1023.0)*value;
  Serial.println(volts);
  value=0;

}