Java program to find Area, Perimeter & Length of diagonal of a Square

Square is a parallelogram with four sides of equal length and with all right angles (90)
Following image shows you how a Square looks like

Following is the Java program that takes Length, Breadth as inputs and compute Area, Perimeter & Length of diagonal of a Square

import java.util.Scanner;

public class AreaAndPerimeterOfSquare {
	public static void main(String[] args) {

		// Taking inputs from user
		Scanner sc = new Scanner(System.in);

		System.out.print("Enter the Length: ");
		double length = sc.nextDouble();

		sc.close();

		double area = length * length;
		double perimeter = 4 * length;
		double diagonal = Math.sqrt(2) * length;
		
		System.out.println("Area: " + area);
		System.out.println("Perimeter: " + perimeter);
		System.out.println("Length of diagonal: " + diagonal);

	}
}

Output

Enter the Length: 2
Area: 4.0
Perimeter: 8.0
Length of diagonal: 2.8284271247461903