Write a program to check entered number is prime or not?

A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. A natural number greater than 1 that is not a prime number is called a composite number.

								
package com.tech.mindclues;

import java.util.Scanner;

public class PrimeNumber {

	public static void main(String arga[]) {

		System.out.println("Enter the number : ");
		Scanner sc = new Scanner(System.in);
		int n;
		Boolean flag = false;
		n = sc.nextInt();

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

			if (n % i == 0) {
				
				flag = true;
			}

		}
		if (flag == true) {

			System.out.println("Entered number not a prime number : ");
			
		} else {
			
			System.out.println("Entered number is prime number :");
			
		}
	}

}

							

								
Enter the number : 
7
Entered number is prime number :