Let's get moving with a coffee mug and enter into the amazing world of JAVA.
Let us brush our basic knowledge first.
Identifiers
A name in a program is called an identifier. Identifiers can be used to denote classes,methods, variables, and labels.
In Java, an identifier is composed of a sequence of characters, where each character
can be either a letter or a digit. Identifiers in Java are case sensitive, for example, price and Price are two different identifiers.
Examples of Legal Identifiers
number, Number, sum_$, bingo, $$_100, mål, grüß
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