Here is a sample code that i used:
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4); //set the LCD address to 0x27 for a 16 chars and 2 line display
void setup()
{
lcd.init();
lcd.backlight();
lcd.setCursor(0, 0);
lcd.print("b2cqshop");
}
void loop()
{
lcd.setCursor(0, 1);
lcd.print('Hello World');
delay(100);
}