#include <LiquidCrystal.h>

double value;
LiquidCrystal lcd(8,9,4,5,6,7);

void setup() {
  lcd.begin(16, 2);
}

void loop() {
  value = (analogRead(0)/1023.0) *5.0 ;
  
  lcd.setCursor(0, 0);
  lcd.print(value);
  lcd.print("V");
}