#5 JAVA variables

Variables and Data Types

Variables

A variable is a place where the program stores data temporarily. As the name implies the value stored in such a location can be changed while a program is executing (compare with constant).

class Example2

 {
public static void main(String args[])
{

int var1;     // this declares a variable
int var2;    // this declares another variable
var1 = 1024;    // this assigns 1024 to var1
System.out.println("var1 contains " + var1);
 var2 = var1 / 2;
System.out.print("var2 contains var1 / 2: ");
 System.out.println(var2);

 }

}

Predicted Output:

 var2 contains var1 / 2: 512

The above program uses two variables, var1 and var2. var1 is assigned a value directly while var2 is filled up with the result of dividing var1 by 2, i.e. var2 = var1/2. The words int refer to a particular data type, i.e. integer (whole numbers).