# How do I use the shift left “<<" operator?

The signed shift left operator `<<` shifts a bit pattern to the left. This operator operates with two operand, the left-hand operand to be shifted and the right-hand operand tells how much position to shift.

Shifting a `0010` bit pattern using the `<<` operator 2 position will produce a `1000` bit pattern. The signed shift left operator produce a result that equals to multiplying a number by 2, which double the value of a number.

``````package org.kodejava.basic;

public class SignedLeftShiftOperator {
public static void main(String[] args) {
// The binary representation of 2 is "0010"
int number = 2;
System.out.println("number      = " + number);
System.out.println("binary      = " +
Integer.toBinaryString(number));

// Using the shift left operator we shift the bits two
// times to the left. This will shift the "0010" into
// "1000"
int shiftedLeft = number << 2;
System.out.println("shiftedLeft = " + shiftedLeft);
System.out.println("binary      = " +
Integer.toBinaryString(shiftedLeft));
}
}
``````

The result of the code snippet:

``````number      = 2
binary      = 10
shiftedLeft = 8
binary      = 1000
``````

1. PAOK

Bolches yarboclos

1 << 33 is 1

• Wayan

Hi Paok,

It’s 2 right? not 1

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