Final answer:
Identifier names like Avg_Val are a style convention in computer programming, not a requirement.
Step-by-step explanation:
An identifier name like Avg_Val is a style convention in computer programming. The use of _ (underscore) is not a requirement but a common practice to improve readability of the code. In many programming languages, identifiers are case-sensitive, so using an underscore can help differentiate between words in a variable name.