---
title: What is Java Variable?
description: "**What is Java Variable?** In Java, a variable is a container that holds data which can be changed during the execution of a program. Each variable in Java has a specific data type that determines the type and size of…"
url: "https://vinothqaacademy.com/docs/what-is-java-variable/"
updated: "2025-10-04"
category: Java
tags:
  - Java
---

# What is Java Variable?

**What is Java Variable?**

In Java, a variable is a container that holds data which can be changed during the execution of a program. Each variable in Java has a specific data type that determines the type and size of data it can hold. Variables are essential for storing data, manipulating it, and passing it within the program.

### **Declaration and Initialization**

To use a variable in Java, you must first declare it and then optionally initialize it with a value. The general syntax for declaring a variable is:

```javascript

                dataType variableName;
```

*And for initializing a variable:*

```javascript

                dataType variableName = value;
```

### **Example**

*Let's look at an example to understand variables in Java better:*

```javascript

                public class Main {
    public static void main(String[] args) {
        // Declaration of variables
        int age;
        double salary;
        String name;

        // Initialization of variables
        age = 25;
        salary = 50000.50;
        name = "John Doe";

        // Output the values of the variables
        System.out.println("Name: " + name);
        System.out.println("Age: " + age);
        System.out.println("Salary: " + salary);
    }
}
```

### **Explanation**

1. ***int age;***

- This declares an integer variable named *age.*

2. ***double salary;***

- This declares a double variable named *salary,*which can hold decimal values.

3. ***String name;***

- This declares a String variable named *name,*which can hold a sequence of characters.

**After declaring the variables, they are initialized with values:**

1. **age = 25;**

- This assigns the integer value 25 to the variable age.

2. **salary = 50000.50;**

- This assigns the double value *50000.50* to the variable *salary.*

3. **name = "John Doe";**

- This assigns the string value "*John Doe*" to the variable *name*.

Finally, the values of the variables are printed to the console using *System.out.println.*