### Java Program to calculate the area and perimeter of a rectangle :

In this tutorial, we will learn how to find the *area* and *perimeter* of a *rectangle*. To find the area and perimeter, we need only *height* and *width* of the rectangle. Area of a rectangle is* ‘height * width’* and perimeter is *‘ 2* ( height + width )’* . Let’s take a look into the program :

### Java program :

import java.util.Scanner; public class Main { //8 /** * Utility function for System.out.println * * @param message : string to print */ private static void println(String message) { System.out.println(message); } /** * Utility function for System.out.print * * @param message : string to print */ private static void print(String message) { System.out.print(message); } /** * main method * * @throws java.lang.Exception */ public static void main(String[] args) throws java.lang.Exception { //1 double height, width, area, perimeter; //2 Scanner scanner = new Scanner(System.in); //3 print("Enter the height of the rectangle : "); height = scanner.nextFloat(); print("Enter the width of the rectangle : "); width = scanner.nextFloat(); //4 area = height * width; perimeter = 2 * (height + width); //5 println("Area = " + area); println("Perimeter = " + perimeter); } }

### Sample Output :

Enter the height of the rectangle : 10 Enter the width of the rectangle : 10 Area = 100.0 Perimeter = 40.0 Enter the height of the rectangle : 9 Enter the width of the rectangle : 15 Area = 135.0 Perimeter = 48.0

### Explanation :

1. Create variables to store *height*, *width*, *area* and *perimeter* of the rectangle.

2. Create one ‘*Scanner*‘ object to scan the values.

3. Read the *height* and *width* of the rectangle.

4. Find the *area* and *perimeter* and save the values in variables ‘*area*‘ and ‘*perimeter*‘.

5. Print out ‘*Area*‘ and ‘*Perimeter*‘