﻿ Java - Print the area and perimeter of a rectangle

# 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) {
// Define constants for the width and height of the rectangle
final double width = 5.6;
final double height = 8.5;

// Calculate the perimeter of the rectangle
double perimeter = 2 * (height + width);

// Calculate the area of the rectangle
double area = width * height;

// Print the calculated perimeter using placeholders for values
System.out.printf("Perimeter is 2*(%.1f + %.1f) = %.2f \n", height, width, perimeter);

// Print the calculated area using placeholders for values
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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