What is the output of the following code and the reason behind the output. You can input the code without the numbered lines.Dont worry about spotting errors, worry about the code and mostly explaining the logic.

1 public class Sample {

2 public static void main(String[] args) {

3 int a = 10;

4 changeValue(a);

5 System.out.println("a = "+ a);

6 }

7 public static void changeValue(int a) {

8 a +=a;

9 }

10 }