Variable Declarations and Initialization

In this lesson, we learn how to declare and initialize variables in Java. A variable is like a container that stores data.

Each section below includes its own complete code example that you can run to see the concepts in action.

What Is a Variable?

A variable is a named space in memory used to store a value that may change during program execution.

Note: In this lesson, we explain the idea of a variable. Code examples in later sections will show how to declare and initialize them. We will learn about variable data types in the next lesson.