Assignment 7

import java.util.*;
public class Gener {
 public static void main(String[] args) { 
 int ch;
 Scanner sc = new Scanner(System.in);
 System.out.println("1.Check even or odd");
 System.out.println("2.Check prime or not");
 System.out.println("3.Check Whether the No. is 
palindrome or not");
 System.out.println("Enter your choice:");  
 ch = sc.nextInt();
 do {
 switch (ch) {
 case 1
 int n;
 System.out.println("Enter the number you 
want to check:");
 n = sc.nextInt();
 ArrayList<Integer> number = new ArrayList<>();
 number.add(n);
 System.out.println(number);
 if (n % 2 == 0) {
 System.out.println(number + " is an even number!");
 } 
 else {
 System.out.println(number + " is an 
odd number!");
 }
 break;

 case 2:
 ArrayList<Integer> number1 = new ArrayList<>();
 System.out.print("Enter the value of 
n:");
 n = sc.nextInt();
 number1.add(n); 
 int count = 0;
 int i;
 for (i = 1; i <= n; ++i) {
 if (n % i == 0) {
 count++;
 }
 }
if (count == 2) {
 System.out.println(number1 + " is 
prime number!");
 } 
 else {
 System.out.println(number1 + " is not prime number!");
 }
 break;
 case 3:
 int num, r, temp;
 ArrayList<Integer> number2 = new ArrayList<>();
 int sum = 0;
 System.out.println("Enter the number to 
check Weather it is palindrome or not:");
 num = sc.nextInt();
 number2.add(num);
 temp = num;
 while (num != 0) {
 r = num % 10;
 sum = (sum * 10) + r;
 num = num / 10;
 }
 if (temp == sum) {
 System.out.println(number2 + " is a 
palindrome number!");
 } 
 else {
 System.out.println(number2 + " is not a palindrome Number!");
 }
break;

 default:
 break;
 }
 }
 while(ch!=4);
 }
}