Learn what a variable is, how to declare it, what types of variables exist, and what scope and modifiers mean in Java, one of the most popular programming languages.

This post explains how to use variables in Java. Learn the primitive types (and what that means) and just why variables are so important for any coding!

You might know that Java passes by value, but it helps to understand why. Here's what happens when you pass mutable and immutable object references in Java.