Welcome to another tutorial from our "How To Code In Java" tutorial series. In the last tutorial, you have learned how to write your very first Java program. In this tutorial, you'll be learning about what's a variable and the different types of it. The basic terminology used for the variable as well as the rules when naming a variable. Since this is a tutorial series on Java, I'll be using Java syntax to explain the topics covered in this tutorial. Other programming languages won't have many differences in their concept, so don't worry much about it. So, let's begin.