#include "WiFi.h"
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2);

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

void calculator()
{
 Serial.println("Enter 1st number");
 int num1 = Serial.readString().toInt();
 Serial.print(num1);
 lcd.setCursor(0,0);
 Serial.print("+");
 lcd.setCursor(5,0);
 delay(20000);
 lcd.setCursor(7,0);
 Serial.println("Enter 2nd number");
 lcd.setCursor(8,0);
 int num2 = Serial.readString().toInt();
 Serial.print(num2);
 int result = num1 + num2;
 lcd.print(result);
 lcd.setCursor(1,0);
 delay(1000);
 lcd.clear();
}

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