24 Jun Java Variables

In this lesson, we will learn how to work with Java Variables. A variable in Java is a reserved area allocated in memory. It is a container that holds value. Each variable is assigned a type, known as a data type.

The reserved area set for the variable stRank is shown below. Here, the variable is assigned a value of 5. Also, you can see that we need a data type to declare a variable. The int data type is used below.

Declare Variables in Java

As shown in the figure above, variables are declared by adding a data type to the variable name.

Here are some examples:

int stRank:
int score;
byte a;
boolean result;

Initialize Variables in Java

To initialize a variable, assign a value to it. Here are some examples:

int stRank = 5;
int score = 90;
byte a = 10;
boolean result = true;

Here’s the usage of variables in a Java program:

For example,

public class Studyopedia {

    public static void main(String[] args) {

        int score = 90;
    }
}

The value of the integer variable above is assigned 90.