1.
Please help me on this problem with only using import java.util.Scanner;.
I'm not certain on how to approach this problem as I keep running to multiple errors. Thanks.
Solution
import java.util.Scanner;
public class MenuDriven {
public static void main(String args[]) {
int startingPoint = 1, startingPrime = 2, ch, n;
final int printPerLine = 10;
Scanner s = new Scanner(System.in);
System.out.println("enter the choice among the menu ");
System.out.println("1.Display prime palindromes 2.display mirrored primes 3.exit prgrm ");
ch = s.nextInt();
switch (ch) {
case 1:
IsItPrime(startingPrime);
IsItPalin(startingPrime);
System.out.println("enter the number upto which prim pal are to be displayed ");
n = s.nextInt();
while (startingPoint <= n) {
if (IsItPrime(startingPrime) && IsItPalin(startingPrime)) {
System.out.print(startingPrime + " ");
if (startingPoint % printPerLine == 0) {
System.out.println();
}
startingPoint++;
}

2.
startingPrime++;
}
break;
case 2:
startingPoint = 1;
startingPrime = 2;
System.out.println("enter the number upto which prim pal are to be displayed ");
n = s.nextInt();
while (startingPoint <= n) {
if (IsItPrime(startingPrime) && !IsItPalin(startingPrime)) {
int rev=reverseNumber(startingPrime);
if(IsItPrime(rev)){
System.out.print(startingPrime + " ");
}
if (startingPoint % printPerLine == 0) {
System.out.println();
}
startingPoint++;
}
startingPrime++;
}
break;
case 3: exit(0);
}
}
public static boolean IsItPrime(int sPrime) {
if (sPrime % 2 == 0 && sPrime != 2) {
return false;
}
int sqrtPrime = (int) Math.sqrt(sPrime);
for (int i = 3; i <= sqrtPrime; i += 2) {
if (sPrime % i == 0) {
return false;
}
}
return true;
}

3.
public static boolean IsItPalin(int sPrime) {
int sPrimeBackup = sPrime;
int reverse = 0;
while (sPrime > 0) {
reverse = reverse * 10 + sPrime % 10;
sPrime = sPrime / 10;
}
return (sPrimeBackup == reverse);
}
public static int reverseNumber(int number){
int reverse = 0;
while(number != 0){
reverse = (reverse*10)+(number%10);
number = number/10;
}
return reverse;
}
}