Question

Write a menu driven program to perform the following task:-

i. To print the seires 40 30 20 10 0

ii. To find the factorial of a number entered by user.​

Answer 1

Answer:

Program:-

import java.util.*;

public class Menu

{

public static void main(String args[ ])

{

Scanner in=new Scanner(System.in);

int ch;

System.out.println("Enter 1 for series");

System.out.println("Enter 2 to display the factorial");

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

ch=in.nextInt();

switch(ch)

{

case 1:

int a;

for(a=40;a>=0;a=a-10)

{

System.out.println(a+ " ");

}

break;

case 2:

int b,fact=1,n;

System.out.println("Enter the number");

n=in.nextInt();

for(b=1;b<=n;b++)

{

fact=fact*b;

}

System.out.println("The factorial of " + n + "=" + f);

break;

default:

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

}

}

}