public class Leftshift_Operator
{  
    public static void main(String args[])
    {  
    System.out.println(10<<2);//10*2^2=10*4=40  
    System.out.println(10<<3);//10*2^3=10*8=80  
    System.out.println(20<<2);//20*2^2=20*4=80  
    System.out.println(15<<4);//15*2^4=15*16=240  
    }
}