[SOLVED] So, I was trying to make an example of function Pass by Reference in java... But it shows me error

Question

https://code.sololearn.com/czAHmXXtct73/?ref=app

Answer 1

Variable 'a' is local main method variable. Not instance variable of pro class.
Declare 'a' outside main method, and in class level scope.

Answer 2

Thanks Jayakrishna🇮🇳