int value, voltage;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:

value = analogRead(A2);
voltage=value*5/1023;
Serial.print("analog value is   ");
Serial.println(value);
Serial.print("voltage is   ");
Serial.println(voltage);
delay(1000);
}