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.example.fundamental;
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. Which 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
```

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