Variable is a container or memory to store data values. A variable is assigned with a data type. There are different types of variables. Here is a few of them will discuss more in future.
- String
- int
- char
- boolean
Syntax
type variable = value;You can use (=) equalto sign for assigning value to the variable for example:
int age = 25;We can use a variable everywhere in a class. let me create an example to understand variable and store some data values
JavaApplication.java
public class JavaApplication {
/*
data and my_data is variables but outside of method
is call global variable we access with anywhere
*/
int data = 50;
static int my_data = 100;
public static void main(String[] args) {
/*
num is variable but inside method
so only we can access within this method
*/
int num = 90;//local variable
// you can print the output and can do anything
}
}Some point you need to remember about above example:
- data and my_data is variables but outside of method is call global variable
- num is variable but inside method so only we can access within this method
Another example of variables
Example of adding two numbers
JavaApplication.java
public class JavaApplication {
public static void main(String[] args) {
int num1 = 10;
int num2 = 20;
System.out.println(num1 + num2);
}
}
Output:
| 30 |
In some upcoming chapter will also understand more about the variables and data types but for now, now you have a clear how to create a variable in the store data value inside a variable so if this example will help you please give Thumbs Up and thanks for coming here.