// add LiquidCrystal Lib
#include <LiquidCrystal.h>
const int rs=12, en=11, d4=5, d5=4, d6=3, d7=2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7); //LiquidCrystal lcd is a function of the datatype LiquidCrystal and lcd is the variable
// libraryFunctions variable

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  lcd.begin(16, 2); //16 columns, 2 rows
}

void loop() {
  // put your main code here, to run repeatedly:
  int a=10, b=5;
  lcd.setCursor(0,0);
  lcd.print(a);
  lcd.print("+");
  lcd.print(b);
  lcd.print("=");
  lcd.print(a+b);
  lcd.setCursor(0,1);
  lcd.print(a);                 
  lcd.print("-");
  lcd.print(b);
  lcd.print("=");
  lcd.print(a-b);
  
  /*lcd.setCursor(0,0);
  lcd.print("....Hello");
  lcd.setCursor(7,1);
  lcd.print("World....");
  lcd.scrollDisplayRight();
  delay(100);*/
}