Java: Print the area and perimeter of a rectangle

Java Basic: Exercise-13 with Solution

Write a Java program to print the area and perimeter of a rectangle.

Java: Perimeter of a rectangle

A perimeter is a path that surrounds a two-dimensional shape. The word comes from the Greek peri (around) and meter (measure). The perimeter can be used to calculate the length of fence required to surround a yard or garden. Following image represents the perimeter of a rectangle.

Java: Area of a rectangle

In Euclidean plane geometry, a rectangle is a quadrilateral with four right angles. To find the area of a rectangle, multiply the length by the width.
A rectangle with four sides of equal length is a square.
Following image represents the area of a rectangle.

Pictorial Presentation:

Sample Solution:

Java Code:

public class Exercise13 {
 
   public static void main(String[] strings) {

        final double width = 5.6;
        final double height = 8.5;

        double perimeter = 2*(height + width);
		
        double area = width * height;			
		
		System.out.printf("Perimeter is 2*(%.1f + %.1f) = %.2f \n", height, width, perimeter);

        System.out.printf("Area is %.1f * %.1f = %.2f \n", width, height, area);
    }
}

Explanation:

In the exercise above -

• Define constant values for the rectangle's width (5.6) and height (8.5).
• Calculate the rectangle perimeter using the formula: 2 * (height + width).
• Calculate the rectangle area using the formula: width * height.
• Prints the perimeter and area values to the console using printf statements with formatted output to display the results with specific decimal precision.

Sample Output:

Perimeter is 2*(8.5 + 5.6) = 28.20 
Area is 5.6 * 8.5 = 47.60 

Flowchart:

Java Code Editor:

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