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Understanding Identifiers in Java | CodeExampler - Learn Free Coding!

📝 Rules for Defining Identifiers in Java

Java has some specific rules and conventions for identifiers:

Must start with a letter (A-Z or a-z), underscore (_), or dollar sign ($).

Examples: myVar, _count, $price

Cannot begin with a number.

Invalid: 1stPlace (Correct: firstPlace)

Case-sensitive: Java treats uppercase and lowercase differently, so myVar and MyVar are distinct identifiers.

No spaces or special characters other than $ or _.

Invalid: user-name (Correct: userName)

Cannot use Java reserved keywords as identifiers (like if, for, class, etc.) https://www.codeexampler.com/java-identifier.