## Free Data Structures and Algorithms Course

### How to Calculate Area and Perimeter of Rectangle in a Java Program

Program to demonstrate how to Calculate Area and Perimeter of Rectangle in Java.

```package com.hubberspot.example;

// Import java.util.Scanner to read data from
// console
import java.util.Scanner;

public class RectangleAreaPerimeterDemo {

public static void main(String[] args) {

// Creating a Scanner object using a constructor
// which takes the System.in object. There are various
// constructors for Scanner class for different
// purposes. We want to use Scanner class to read
// data from console on the system, So we are using
// a constructor which is taking an System.in object
Scanner scanner = new Scanner(System.in);

// Create three variables which will hold the
// values for length, breadth , area and perimeter of Rectangle.
int length = 0;
int area = 0;
int perimeter = 0;

// prompt the user to enter value of length of
// Rectangle
System.out.print("Enter the length of Rectangle : ");

// store the length into length variable entered by user
length = scanner.nextInt();

// prompt the user to enter value of breadth of
// Rectangle
System.out.print("Enter the breadth of Rectangle : ");

// Calculate area of Rectangle by multiplying length into breadth.

// Calculate perimeter of Rectangle by 2 * (length + breadth)
perimeter = 2 * (length + breadth);

// Output area and perimeter to the console
System.out.println("Area of Rectangle is : " + area);
System.out.println("Perimeter of Rectangle is : " + perimeter);
}
}

```

Output of the program :

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