4-2 Variable naming rule error

[ybakos]

In Section 4-2, Variable declaration and initialization, there's an error in the second paragraph. "...and must start with a letter..." However, identifiers can start with an underscore.

Java's identifier rules are:

• cannot be the same as a reserved word
• can only include alphanumerics and the underscore
• cannot start with a digit

This is minor, but students have been getting some test questions wrong and cited the book as the reason why. So I gave them a few points and am posting this errata.

Thanks for all things LP!

[shiffman]

Ooops, thanks for the correction!