Write a Java program to find the Area of the Circle, Rectangle and Triangle.
PROGRAM :
import java.util.*;
class area1
{
public static void main(String[] args) throws InputMismatchException
{
Scanner sc = new Scanner(System.in);
double area;
System.out.println("Main Menu");
System.out.println("1. Circle");
System.out.println("2. Ractangle");
System.out.println("3. Triangle");
System.out.println("Enter your choice(1,2,3) : ");
int ch;
ch=sc.nextInt();
switch(ch)
{
case 1:
System.out.print("Enter the radius : ");
double r=sc.nextDouble();
area=r*r*3.14;
System.out.println("\nThe area of Circle is : "+area);
break;
case 2:
System.out.print("Enter the length : ");
double l=sc.nextDouble();
System.out.print("Enter the width : ");
double w=sc.nextDouble();
area=l*w;
System.out.println("\nThe area of Ractangle is : "+area);
break;
case 3:
System.out.println("Enter sides of triangle : ");
System.out.print("Enter side1 : ");
double a=sc.nextDouble();
System.out.print("Enter side2 : ");
double b=sc.nextDouble();
System.out.print("Enter side3 : ");
double c=sc.nextDouble();
double s=(a+b+c)/2;
area=Math.sqrt(s*(s-a)*(s-b)*(s-c));
System.out.println("\nThe area of Triangle is : "+area);
break;
default:
System.out.println("Wrong choice !!!");
break;
}
}
}