Answer:

Sure! Here's an example of a program that calculates the area of a square, triangle, or rectangle based on the user's choice using a switch case:

```python

def calculate_area():

choice = input("Enter your choice (1 for square, 2 for triangle, 3 for rectangle): ")

# Convert the choice to an integer

choice = int(choice)

# Switch case

if choice == 1:

side = float(input("Enter the side length of the square: "))

area = side * side

print("The area of the square is:", area)

elif choice == 2:

base = float(input("Enter the base length of the triangle: "))

height = float(input("Enter the height of the triangle: "))

area = 0.5 * base * height

print("The area of the triangle is:", area)

elif choice == 3:

length = float(input("Enter the length of the rectangle: "))

width = float(input("Enter the width of the rectangle: "))

area = length * width

print("The area of the rectangle is:", area)

else:

print("Invalid choice!")

# Call the function

calculate_area()

```

You can run this program and choose the desired shape to calculate its area. Let me know if you have any questions!

Verified answer

import java.util.Scanner;

public class area_of_cir_squr_rect_tri_using_switch {

public static void main(String[] args)

{

Scanner sc = new Scanner(System.in);

System.out.println("MENU:");

System.out.println("1.Area of circle");

System.out.println("2.Area of square");

System.out.println("3.Area of rectangle");

System.out.println("4.Area of triangle");

System.out.println("Please enter any of the above option: ");

int num = sc.nextInt();

switch(num)

{

case 1:

System.out.println("Please enter radius of circle: ");

double radius = sc.nextFloat();

double areaCircle = (22 * radius * radius) / 7;

System.out.println("Area of circle is: " + areaCircle);

break;

case 2:

System.out.println("Please enter size of square: ");

int size = sc.nextInt();

int areasquare = size * size;

System.out.println("Area of ractangle is: " + areasquare);

break;

case 3:

System.out.println("Please enter length and breadth of rectangle: ");

int length = sc.nextInt();

int breadth = sc.nextInt();

int areaRectangle = length * breadth;

System.out.println("Area of ractangle is: " + areaRectangle);

break;

case 4:

System.out.println("Please enter base and height of triangle: ");

double base = sc.nextFloat();

double height = sc.nextFloat();

double areaTriangle = (base* height) / 2;

System.out.println("Area of triangle is: " + areaTriangle);

break;

default:System.exit(0);

}

sc.close();

System.out.println("Welcome to computerpathsala.com");

}

}