Which of the following are valid identifiers? If they are invalid, indicate why. a. intValue b.

step 1 Okay, they ask us which are valid identifiers. Well, this one is. Why? Well, it's not a keyword.

Which of the following are valid identifiers? If they are...

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Key Concepts

Identifier

An identifier is a name given to a program element such as a variable, function, or class. It allows programmers to refer to these elements with a unique name within the code. Understanding identifiers is essential as they are used to organize and communicate the purpose of different code sections.

Valid Identifier Rules

Valid identifiers follow specific naming rules defined by the programming language. Typically, they must start with a letter or an underscore, can include digits (but not as the first character), and should not contain spaces or special characters other than the underscore. This ensures that the identifier can be correctly recognized by the compiler or interpreter.

Special Characters in Identifiers

Many programming languages restrict the use of special characters in identifiers because they may conflict with the syntax of the language. Characters such as '#' or whitespace are usually disallowed, making any identifier that contains them invalid. Understanding these restrictions is key to writing syntactically correct code.

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