#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

void setup() {
  // Init
  lcd.init();
  lcd.backlight();
  
  // Print something
  
}


void loop() {
  int temp,x,gradeCounter;
if(gradeCounter<=5)
{
  lcd.print("Enter grade; ");
}
if(Serial.available()>0)
{
   temp=Serial.parseInt();
   if(temp!=0)
     x=temp;
  lcd.setCursor(0,1);
  lcd.print("           ");
  lcd.setCursor(0,1);
  lcd.print(x);
}
}