#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);

void setup() {
  Serial.begin(9600);
  Serial.println("Calculator for addition");
  lcd.init();
  lcd.backlight();
}

void calc(){
  Serial.println("Enter 1st Number");
  int num1 = Serial.readString().toInt();
  lcd.setCursor(0,0);
  lcd.print(num1);
  Serial.println(num1);
  delay(2000);

  lcd.setCursor(5,0);
  lcd.print("+");

  Serial.println("Enter 2nd Number");
  int num2 = Serial.readString().toInt();
  lcd.setCursor(8,0);
  lcd.print(num2);
  Serial.println(num2);
  delay(2000);

  int result = num1 + num2;
  lcd.setCursor(1,1);
  lcd.print(result);
  delay(1000);
  lcd.clear();
}

void loop() {
  delay(2000);
  calc();
}