import java.util.Scanner;

public class primeNo {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

boolean b;

do {

System.out.println("1. Prime Number Check \n2. Range for Prime Number");

int num = sc.nextInt();

switch(num)

{

case 1:

System.out.print("Enter any Number to Check ");

int n = sc.nextInt();

primeCheck(n);

break;

case 2:

System.out.println("Enter The Range To Find all Prime Number ");

int n1 = sc.nextInt();

primeRange(n1);

break;

default:

System.out.println("You Have entered Wrong Key ");

break;

}

System.out.println("\nDo You Want To Close (Y/N) ");

char ch = sc.next().charAt(0);

if(ch =='Y' || ch == 'y')

b = false;

else

b = true;

}while(b);

}

public static void primeCheck(int n)

{

int c = 0;

for(int i = 2; i<n; i++) {

if(n % i == 0)

c++;

}

if(c == 0)

System.out.print("Prime Number " + n);

else

System.out.print("Not Prime Number " + n);

}

public static void primeRange(int r)

{

for(int k = 2; k<=r; k++)

{

int c = 0;

for(int i = 2; i<k; i++) {

if(k % i == 0)

c++;

}

if(c == 0)

System.out.print(k + " ");

}

}

}