#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd (0x27, 16,4);
void setup() {
  Serial.begin(9600);
  Serial.println("Calculator for addition");
  lcd.init ();
  lcd.backlight ();

}

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

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

  lcd.setCursor(5,0);
  lcd.print("+");
  delay(3000);
  Serial.println("Enter 2nd Number -");
  int num2 = Serial.readString().toInt();
  lcd.setCursor(8,0);
  lcd.print(num2);
  delay(3000);
  lcd.setCursor(3,1);
  lcd.print("=");

  int result = num1+num2;
  lcd.setCursor(5,1);
  lcd.print(result);

  delay(5000);
  lcd.clear();
}