Variable

Question

There are two known naming conventions:
Pascal case: The first letter in the identifier and the first letter of each subsequent concatenated word are capitalized. For example: BackColor
Camel case: The first letter of an identifier is lowercase and the first letter of each subsequent concatenated word is capitalized. For example: backColor

Answer 1

What about all caps?
FOR_A_CONSTANT

Also this isn't a question.

Answer 2

There's more than 2.

Ex.
back_color

Answer 3

why?