prime number program in java using scanner

1// Prime number program in java using scanner
2import java.util.Scanner;
3public class PrimeNumberUsingScanner 
4{
5   public static void main(String[] args) 
6   {
7      Scanner sc = new Scanner(System.in);  
8      System.out.println("Please enter a number to check prime number: ");  
9      int number = sc.nextInt();  
10      if(checkPrimeNumber(number)) 
11      {  
12         System.out.println(number + " is a prime number");  
13      }
14      else 
15      {  
16         System.out.println(number + " is not a prime number");  
17      }
18      sc.close();
19   }
20   public static boolean checkPrimeNumber(int number) 
21   {  
22      if(number <= 1) 
23      {  
24         return false;
25      }  
26      for(int a = 2; a < Math.sqrt(number); a++) 
27      {  
28         if(number % a == 0) 
29         {  
30            return false;  
31         }  
32      }  
33      return true;  
34   }
35}

1public class Prime {
2    public static void main(String[] args) {
3
4        int num = 29;
5        boolean flag = false;
6        for(int i = 2; i <= num/2; ++i){
7            if(num % i == 0){
8                flag = true;
9                break;
10            }
11        }
12
13        if (!flag)
14            System.out.println(num + " is a prime number.");
15        else
16            System.out.println(num + " is not a prime number.");
17}}

1public class Prime {
2    public static void main(String[] args) {
3
4        int num = 29;
5        boolean flag = false;
6        for(int i = 2; i <= num/2; ++i){
7            if(num % i == 0){
8                flag = true;
9                break;
10            }
11        }
12
13        if (!flag)
14            System.out.println(num + " is a prime number.");
15        else
16            System.out.println(num + " is not a prime number.");
17}}
18Source:www.progra
19