Java TutorialLesson 7Free preview

Java Variables

This lesson is part of Java · All levels

Summary

A variable is a naming container for storing data in a Java program. You learn how to declare variables by writing down the data type followed by the name and the initial value, and the valid naming rules like you shouldn't prefix numbers or keywords. Java also recognizes the var type that facilitates short declarations.

Key points

The declaration of variables is written in the type formatData name = value;
The name of the variable may contain letters, numbers, $, and _, but it must not be preceded by numbers
Variables must be declared and given a value before use, or program error
Keywords like int, class, and static should not be used as variable names.

Full lesson

Code examples and quizzes

Full lessons, code examples, and quizzes are available to subscribers. 5 questions.