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Java Variables - Examples


Real-Life Examples

Often in our examples, we simplify variable names to match their data type (myInt or myNum for int types, myChar for char types, and so on). This is done to avoid confusion.

However, if you want a real-life example of how variables can be used, take a look at the following, where we have made a program that stores different data of a college student:

Example

// Student data
String studentName = "John Doe";
int studentID = 15;
int studentAge = 23;
float studentFee = 75.25f;
char studentGrade = 'B';

// Print variables
System.out.println("Student name: " + studentName);
System.out.println("Student id: " + studentID);
System.out.println("Student age: " + studentAge);
System.out.println("Student fee: " + studentFee);
System.out.println("Student grade: " + studentGrade);

Try it Yourself »


Calculate the Area of a Rectangle

In this real-life example, we create a program to calculate the area of a rectangle (by multiplying the length and width):

Example

// Create integer variables
int length = 4;
int width = 6;
int area;

// Calculate the area of a rectangle
area = length * width;

// Print variables
System.out.println("Length is: " + length);
System.out.println("Width is: " + width);
System.out.println("Area of the rectangle is: " + area);

Try it Yourself »


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