Every Java variable requires a unique name, known as an identifier.
Identifiers can be brief, such as x and y, or more descriptive, like age, sum, or totalVolume.
Note: Employing descriptive names is advised to ensure the creation of comprehensible and maintainable code:
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Here are the general rules for naming variables:
Variable names can consist of letters, digits, underscores, and dollar signs.
They must commence with a letter and can also start with $ or _ although it's not recommended.
Names are case-sensitive, distinguishing between "myVar" and "myvar".
Avoid using reserved words, such as Java keywords like int or boolean, as names.