Question

Write a program to display a menu to calculate area of square, rectangle and circle
Calculate the area based on the user's choice.
java program

Answer 1

Answer:

Program:-

import java.util.*;

public class Brainly_Answer

{

public static void main(String args[ ])

{

Scanner in=new Scanner(System.in);

int ch,ar=0;

System.out.println("Enter 1 to calculate the area of square");

System.out.println("Enter 2 to calculate the area of rectangle");

System.out.println("Enter 3 to calculate the area of circle");

System.out.println("Enter your choice");

ch=in.nextInt();

switch(ch)

{

case 1:

int a;

System.out.println("Enter the side of square");

a=in.nextInt();

ar=a*a;

System.out.println("The area of square="+ar);

break;

case 2:

int l,b;

System.out.println("Enter the length and breath of rectangle");

l=in.nextInt();

b=in.nextInt();

ar=l*b;

System.out.println("The area of rectangle="+ar);

break;

case 3:

int r;

double area=0;

System.out.println("Enter the radius of circle");

r=in.nextInt();

area=22.0/7.0*r*r;

System.out.println("The area of circle="+area);

break;

default:

System.out.println("Invalid choice");

}

}

}

Understand the program:-

• I used ar variable so that I can use it multiple times for circle I used double area as the answer is always in double data type.
• I entered 1 for choice and entered side of square 6 it gave the result 36
• If I entered 2 for choice and entered side of rectangle 7 and 9 it gave me output 63
• If I entered 3 for choice and entered radius as 7 cm so it gave me result as 154

Sorry I didn't gave the input in the photos as the limit will be crossed so I told u the input here.