What is wrong with declaration statements below: int first = 10, New = 12, last = 3, old = 40;

Answer 1

There isnt anything wrong.
If you used new instead of New it is an error because 'new' is a keyword.

Answer 2

What error are you getting? Can you show your full code because there's nothing wrong with the code above.

Answer 3

u can not follow naming convention variable name should be in small letter when we use new in place of New than show error because new is a keyword and we not use keyword in declaration.