Question

import java.util.Scanner;

import java.text.value;

public class Rectangle

{

public static void main(String[]args){

System.out.println("Find the area of a rectangle");

System.out.println("Find the perimeter of a rectangle");

System.out.println("Enter a number of choice");

}

public static void main(String[]args){

int choice = //the user choice

double value :0 // the value returned from the method

double length; // the length of rectangle

double width;// the width of rectangle

Scanner scan = new Scanner(System.in);

System.out.println("Enter length: ");

double length = scan.nextDouble(); //the length of rectangle

System.out.println("Enter width :");

double width = scan.nextDouble(); //the width of rectangle

double area = length*width; //calculating area

double perimeter = 2*(length+width); //calculating perimeter

System.out.println("Area of rectangle is:" + value);

System.out.println("Perimeter of rectangle is:"+value);

}

}

Please fix this Java program to get output and update it  

Answer 1

Java program to get the output of the rectangle's area & perimeter :-

import java.util.Scanner;

public class Rectangle
{
  
public static void main(String[] args)
{
  
//Scanner object is one of the connection ehich acts as an interface between Console and Java Application.
Scanner scan = new Scanner(System.in);

System.out.println("Enter length: ");
//when we press enter after entering the value, the value is dropped into the scan object.
double length = scan.nextDouble();
// Here scan.nextDouble(); reads the value of the length of the rectangle from scan object.

System.out.println("Enter width :");
//when we press enter after entering the value, the value is dropped into the scan object.
double width = scan.nextDouble();
//Here scan.nextDouble(); reads the value of the width of the rectangle from scan object.

double area = length*width; //calculating area
double perimeter = 2*(length+width); //calculating perimeter

System.out.println("Area of rectangle is:" + area);
System.out.println("Perimeter of rectangle is:"+perimeter);

}

}

Compilation :-

Javac Rectangle.java

Execution :-

Java Rectangle

Output :-

Enter length :

5

Enter width :

5

Area of rectangle is :25.0

Perimeter of rectangle is :20.0