Variables are essential in programming as they allow us to store and manipulate data. In this article, we will explore the basics of variables, their types, and how to use them effectively.

Types of Variables

There are several types of variables, each serving a different purpose. Here are some common types:

  • Integer: Used for whole numbers, such as 1, 2, 3.
  • Float: Used for numbers with decimal points, such as 1.5, 2.75.
  • String: Used for text, such as "Hello, World!".
  • Boolean: Used for true or false values.

Declaring Variables

To declare a variable, you need to specify its type and a name. For example:

int age = 25;
float pi = 3.14159;
String name = "John Doe";
boolean isStudent = true;

Using Variables

Once you have declared a variable, you can use it in your program. For example:

System.out.println("My name is " + name);

This will output: "My name is John Doe".

Best Practices

  • Choose meaningful names for your variables.
  • Use the appropriate type for your data.
  • Avoid using reserved keywords as variable names.

Learn More

For more information on variables and programming, check out our Advanced Variables Guide.

Variable Types

In the next section, we will delve deeper into variable scope and how it affects their accessibility. Stay tuned!