The length and breadth of a rectangle and radius of a circle are input through the keyboard. Write a program to calculate the area and perimeter of the rectangle and the area & circumference of the circle

Rectangle: Area==>l*b
perimeter==>2(l+b)

circle:   Area==>Pi*r(2)
perimeter==>2pi(r)

class Rectangle
{
public static void main(String args[])
{
float l,b,r_area,r_peri,r,c_area,cir;
System.out.println(“enter the length and breadth:”);
Scanner s=new Scanner(System.in);
l=s.nextFloat();
b=s.nextFloat();
System.out.println(“enter the radius”);
r=s.nextFloat();
r_area=l*b;
r_peri=(2*(l+b));
c_area=3.14*r*r;
cir=2*3.14*r;
System.out.println(“Area of Rectangle=”+r_area);
System.out.println(“Perimeter of Rectangle=”+r_peri);
System.out.println(“Area of Circle=”+c_area);
System.out.println(“Circumference of circle=”+cir);
}
}

Similarly,

Here’s a Java program that takes the length and breadth of a rectangle and the radius of a circle as input from the keyboard. It calculates:

• Area and Perimeter of the Rectangle

• Area and Circumference of the Circle

✅ Java Code

import java.util.Scanner;

public class ShapesCalculator {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);

// Input for Rectangle
System.out.print(“Enter length of the rectangle: “);
double length = sc.nextDouble();

System.out.print(“Enter breadth of the rectangle: “);
double breadth = sc.nextDouble();

// Area and Perimeter of Rectangle
double rectArea = length * breadth;
double rectPerimeter = 2 * (length + breadth);

// Input for Circle
System.out.print(“Enter radius of the circle: “);
double radius = sc.nextDouble();

// Area and Circumference of Circle
double circleArea = Math.PI * radius * radius;
double circleCircumference = 2 * Math.PI * radius;

// Output
System.out.println(“\n— Rectangle —“);
System.out.println(“Area: ” + rectArea);
System.out.println(“Perimeter: ” + rectPerimeter);

System.out.println(“\n— Circle —“);
System.out.println(“Area: ” + circleArea);
System.out.println(“Circumference: ” + circleCircumference);

sc.close();
}
}

Output:

Enter length of the rectangle: 10
Enter breadth of the rectangle: 5
Enter radius of the circle: 7

— Rectangle —
Area: 50.0
Perimeter: 30.0

— Circle —
Area: 153.93804002589985
Circumference: 43.982297150257104