// LCD1602 to Arduino Uno connection example

#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
int val;
void setup() {
  lcd.begin(16, 2);
  // you can now interact with the LCD, e.g.:
  
  pinMode(3,INPUT);
  Serial.begin(9600);
}

void loop() 
{
val=digitalRead(3);
lcd.setCursor(0,1);
Serial.println(val);
lcd.print(val);
}